Making a Formboard Dice Tower

Playing tabletop games is one of the joys in life. Sometimes the board takes up all of the table and there's nowhere to roll the dice, and sometimes your buddy has mastered the wrist action to get the roll he wants that perhaps you don't want him to get.

A dice tower is a common way of keeping the dice on the table while making the roll totally random. A blend of form and function, this instructable will show you how to make one out of a sheet of foamboard, some toothpicks, felt and glue. The tower is very sturdy and can easily take a drop or two off the table.

Build a dice tower for you next RPG or board game night then decorate however you wish. I've shown a possible spray paint option but once it's built, the sky's the limit for how it finally looks.

Here is an 8 second video of the dice tower in action. Listen to the melody of the dice hitting the steps on the way down.



Don't miss my other exciting dice themed instructable - "BIG BRASS ONES" available here

Step 1 Get together the tools and materials

You will need an open work area and a surface you can use to cut the foamboard on. I used a large cutting mat but one or two layers of cardboard would be fine.

TOOLS:

• Metal ruler/straight edge - when cutting foamboard you have the knife riding the edge and it would dig in and cut the edge of plastic or wood rulers.
• Sharp Knife - A utility knife, a xacto knife, a box cutter style knife, whatever you have will work, just put in a new virgin blade because foamboard wants a sharp edge and dulls it quickly.
• Blue/non marking masking tape & pen to write on it
• Wire cutters or large toenail clippers to cut toothpicks with
• 10 pushpins
• scrap piece of 2x4 or something solid about that size.
• small hobby paint brush & cup of water to dunk it in. Cheap brushes are good - you are using this to spread the glue evenly.
• rag/clean cloth

MATERIALS:

• printout of the foamboard dice tower.pdf file included with this instructable. 4 pages, just plain ol' regular paper. IMPORTANT: when printing, make sure that the pages are not resized in anyway - pdf viewers always seem to want to shrink the page to fit. It should fit already, there are at least 1/2" margins all around. It needs to print at 100% size to make the templates work.
• Standard 20" x 30" sheet of foamboard AKA foamcore. In this instructable I'm using the term foamboard but it's also known as foamcore in some areas. Foamboard is basically a thin sheet of foam sandwiched between two layers of thick paper. Total thickness is around 3/16". I had a nice sheet of white laying around and used that. If I did it again, I would pay the extra few $$ and get the black paper and black foam version, so priming it black before painting didn't take so much primer.
• A box of rounded toothpicks. Make sure it's the rounded version, the flats won't work as well.
• White glue - I had a bottle of the classic Elmer's
• Sheet of felt (color of your choice) with adhesive on one side. A 9" x 12" sheet costs under $1 at craft stores/Walmart

OPTIONAL:

• Carpenter's Glue
• Spray Paint and/or Primer

Comments

[dungeon runner]

Nice 'ible! What if you had rotating platforms in the center of the tower instead of static baffles, so that every time the dice hit them they spin a little bit and further randomize future rolls?

-Y

[donbar]

You cannot have 'more' randomness in a static die (or dice) roll by adding more physical manipulation. Whichever die you choose, let's say 1 six-sided die, you will ALWAYS have a 1 in 6 chance of landing on a particular number--no matter how many baffles or platforms it tumbles on! If you want, or need, more randomness then you need to change to a different die, such as an eight-sided die. Then you only have 1 in 8 chances to see a particular number. Or, you can add an additional die to increase the range, but at the cost of losing lower number(s). So, if you roll 2 six-sided dice for more randomness then your range will be 2-12, not 1-12.

[caseydavis100]

I have an idea to make this look a little nicer. cut out all of the foam board pieces, paint then black, assemble them in to the tower, then add the felt. That way you have no white spots in the foam, and the felt stays clean.

[Steve.D.W.]

I was thinking the very same thing Casey. Also I've never worked worked with foam board before so I don't know how durable it is. But if you want to make one that would really last you could use the foam board pieces as stencils to make it out of wood and put it together with wood glue and nails/screws.

[mysss]

...or you could use the stencils from the beginning of the project as stencils?

[matrix828]

could i make this out of balsa wood? would it work? thanks
5* + fav :)

[wario235]

Sweet. I just made mine (little plexi-glass version; same principle) and it works like a charm. Quite random (that discussion in the earlier comments was a little too in-depth for me). I had to adjust the last baffle just right so that the dice were sent out well enough (spits them out good now). I'd like to make this out of some light wood, if/when able. Would make for a great gift for any table-top gamer. Rock on.

[afrocat]

Thank you so much! I've just made this dice tower and it's sturdy, functional, and has a great aesthetic appeal!

[billytwix]

i made this tower and used silk from a tie for the landing. i play Warhammer Fantasy / 40K competitively a few times a month at different locations in texas. I HAVE NOT PLAYED ONE SINGLE GAME WHERE SOMEONE DIDN'T APPROACH ME AND COMPLIMENT ME ON THIS TOWER! Its magical, i think. I added an extra step for the dice to bounce off of inside. This is great, portable, super sturdy, and pretty cheap if you are using foamboard/foamcore for other projects and you have some left overs. It's great when you have to roll 50 d6 for one unit's attacks. The only problem I've had with it: Bounce out dice. Sometimes when i roll massive quantities they will jump out of the bottom tray. My solution was just putting my hand over the opening at the bottom. If i wasn't lazy i would add an acrylic sheet to cover the opening Great Instructible, Great Fun, Great way to keep me from losing my sanity at games. L

[trevor3693]

could the bounce out problem be from your extra step?

[ojochris]

What is a dice tower for? a certain game?

[Karnivore]

It's for D&D. It's used for several reasons, too. First, it can be used if there's no room to roll dice. Second, it can be used to store dice in the trough in the bottom, although most people get bags. And finally, you don't have to chase dice across the carpet if they go off the table. Hope that clears things up.

[ojochris]

(Dungeons and dragons, right?) lol makes sence.

[Karnivore]

One and the same. Good job! I've made one out of cardboard myself, and I'm thinking of putting it up as an Instructable.

[ojochris]

Go for it!

[trevor3693]

scince its 2 years later i guess u never did it.   :P

[pyroboy212]

if you put cork board or craft foam on the inside you could make it quieter. @_@

[Mustakrakish]

why would you want to do that? the sound of dice rolling is music to a gamer...

[dungeon runner]

Haha, so true. That plus the sound of pencils scratching and plastic Minis clacking.

Beautiful.

-Y

[cthulu13]

Got the parts yesterday for under $10 and made it in about 3 hours - awesome!
A fantastic instructable.  I used the black on black foamboard and put red felt on the steps, and I found a matching sheet of really thin red foam that I cut out for the tray.
I also found that after I put the steps on it was easier for me at least to just glue and place the pieces in, then poke the holes with a pushpin and then use a whole toothpick rather than poking then gluing...

[hellboychess]

Thanks for this excellent tutorial ! I made my dice tower today. I can now play Battlelore and Arkham Horror with this...

[sida102]

Thanks heaps for making this tutorial. I made mine today and it came out really well. I play a lot of Memoir 44 and the dice always end up bowling over some troops so this is a great solution to the problem. Was really easy to follow and even a poor craftsman like me managed to make it look pretty good. Well done!

[zascecs]

I love dice! lol

[sowersk]

I agree with Bay. Whole toothpicks were easier to handle for my giant hands.

[troyml]

Where have I been that I've never seen a dice tower before? I think I might try to make one out of clear acrylic, lexan or something similar.

[arutkow]

I was wondering about the middle baffle. If you were to instead use some little pegs or perhaps a piece of wire, do you think that might randomize the tumble even more? Just a suggestion. It's already a great looking instrucible! -Abram

[jgscott987]

Very nice Instructable! I wonder how random this tower really is. I'd bet that if you took one die and dropped it in the tower from the same position 100 times, the outcomes would not be evenly distributed. I bet you could get it to land on the same number 50% of the time. Using multiple dice increases the 'randomness' as they knock into each-other as well as the baffles in the tower, but you could still generate a non-uniform distribution of outcomes. This is a neat, fun project, but I think it gives you a less random outcome than simply throwing the dice.

[Mustakrakish]

I'll take that bet. I will be building one of these this week and I'll run a test. I bet you'll get the classic bell curve.

[jgscott987]

Just FYI, you don't want a bell curve, you want a uniform distribution (each result comes up an equal number of times).

[dread]

Note that D&D has been mentioned previously here. When rolling attribute scores in most RPGs one typically rolls 3d6 or similar, in which case you will see a "classic bell curve", which is likely what Mustkrakish was referring to. I don't think a test would be required as dropping dice in any uncontrolled fashion will likely result in enough randomness being introduced. One major point of using a device like this is that each "step" introduces more "random" activity into the mix.

[kelseymh]

This is just an instance of the Central Limit Theorem ("everything is Gaussian if you wait long enough"). A single unbiased die produces (by definition) a uniform sampling of values from 1 to 6. If you roll Nd6, you'll get N*3.5 as the most probable value, and N and N*6 as (equally) least probable values. As N increases, the height of the central peak (at N*3.5) will increase relative to the tails (technically, the variance will decrease). See also "dread"'s followup to this posting, below.

As for the original comment about randomness in the dice tower...that depends on the number of baffles. A die falling through the tower is equivalent to a single BB falling through a Pachinko. The successive bounces are "highly sensitive to initial conditions" (to borrow a phrase from chaos theory; damn you, Jeff Goldblum!).

While it might be true in principle that you could get non-random outcomes from identically positioned die falls, in practice you would not be able to reposition the die sufficiently precisely to achieve the same sequence of bounces. This is especially true if, as intended, you drop the die into the tower from above, rather then resting it on the first baffle in a specific location.

[jgscott987]

Very interesting conversation. It still seems to me that if I drop a single die into the tower from approximately the same position, with the same number facing up each time, the results would not be uniform. Slight variations in the position of the die at release would certainly create some randomness, but not complete randomness. Unlike a Pachinko, the die is only bouncing off of 2 or 3 parallel/perpendicular baffles. Obviously this is a purely theoretical conversation. Rarely would you use only one die, and even more rarely would your opponent allow you to carefully position the die for each roll. Thought-provoking nonetheless. Anyone out there what to give this a real-world test?

[dread]

One thing I neglected to mention (if one is not familiar with RPGs and character creation) is that the 3 dice are added together, counting as one roll total. Plotting a large number of rolls will produce a classic bell curve. Here's a good article on the topic http://www.d20srd.org/srd/variant/adventuring/bellCurveRolls.htm

[kelseymh]

This is a really well-constructed I'ble. Clear and complete instructions, and I do like the project-board backdrop for the assembly stages. Keeps the whole architectural/quilting ambiance alive :-) As you may have noticed from my previous comment (far below), I've added this I'ble to the Assistive Technology Group; please let me know if you object.

[mrmath]

Never heard of this. I have to say that I think I would miss the "feel" of throwing the dice, but if you have limited space, this is definately a good idea. Also, I can also see this as an assitive device. Someone might be able to pick up the dice, but not shake them. If they can pick them up and drop them in the tower, they can "roll" the dice.

[MaxMacGyver]

I agree. As I am disabled, this would be helpful to me. This would also be good for children whose hands are too small to shake the dice or who tend to throw their dice too vigorously. :) Great instructable! (and my first comment!)

[kelseymh]

Very intereresting comment! I hadn't thought of it, but you're right that the dice tower is an example of assistive technology (shameless plug for the new Group I created). I've duly added it to the AT Group.

[puffyfluff]

I finally got around to making one of these a few months ago, and I have used it ever since. Everyone loves it.

[bkindt]

This is fantastic. I'm going to import the template into MS Visio to make a few modifications: 1. I'm going to make the tray walls just a tad higher to help reduce bounce-out. 2. I'm going to make the tray just a tad (maybe 1") longer to add dice capacity. I've made towers out of wood before, and its a lot more work, especially when it comes to mounting the interior ramps. The only tried and true method I've found of doing this with wood is using a router to cut slots in the side walls, then gluing in the ramps. This foam core method looks tremendously easier, with only a minor decrease in quality. Thanks again!

[Eye Poker]

When you glue the pieces together glue 2 sides together. Then put in the top and bottom ramps. Then glue the third side on. Finally use the 3/4 built tower to position the middle ramp on the fron piece. Let it dry and then fully assemble.