3 Simple Ways to
Share What You Make

With Instructables you can share what you make with the world — and tap into an ever-growing community of creative experts.

PhotosPhotos

Share one or more photos of a project, recipe, or whatever you've made, quickly and easily.

Step by StepStep-By-Step

Share your step-by-step photos with text instructions of what you made so others can do it too!

VideoVideo

Share your how-to video. You'll need your embed code from a video site such as YouTube.

Disappearing Expo Marker Point Trick

Disappearing Expo Marker Point Trick
It's the day before April Fool's Day. You are really itching to pull off a prank on someone.
How about a teacher? Hmm. What do a lot of teachers use every day at school...? Dry erase markers! Guaranteed, the teacher will use it in class, and everyone will see your prank in action.

Here's how to make a device that's not so difficult to make - you can make it the day right before, and it only requires a few things that a lot of people have lying around the house.

The end result:

Your teacher opens that marker and starts writing on the board. Only... all of a sudden, the tip of the marker disappears! What, in the world? (resulting in an end of the lesson due to having nothing to write with. Free period!)

Side notes:
This is something entirely original - I didn't get this idea from anywhere (well, at least not from anywhere I've seen).

Don't be daunted by the numerous pictures and steps - I just tried to make this relatively easy process completely foolproof :D

AND REMEMBER:
If you like this idea, please vote for me in the April Fool's Project Prank Contest!

 EDIT: I now have a video of using it:
Disappearing Marker Tip Trick @ Yahoo! Video
 
Remove these adsRemove these ads by Signing Up
 

Step 1Materials and material manipulators

Materials and material manipulators
«
  • P1030557.JPG
  • P1030561.JPG
  • P1030559.JPG
  • P1030560.JPG
You'll only need a few household items and very minimal, common tools.

Materials:


1. Empty Expo (dry erase) marker
Recycle! I got mine by asking my math teacher when he was about to throw it away.

2. 1 rubber band
It helps if it's circular or squarish

3. Disposable Wooden Chopstick
You only need one of the two, and it should be the rectangular tapered kind

Material manipulators (tools):


1. Pocketknife (opt. with serrated edge)
for enlarging holes and cutting the chopstick later on

2. Craft wire
yes, I know, it's more of a material, but here we use it as helping hand - to poke through holes that are too small to use only our fingers

3. Needle nose pliers
To remove the marker tip

4. Sharpie marker
To color the chopstick black, like the original color of the Expo marker

5. (Multiple choices)
     a. Small triangular tapered file (what I used)
     b. Tiny flathead screwdriver - the kind used for eyeglasses or other small screws (not pictured)
     c. Drill bit of the same diameter as the hole at the front of the marker - the one that the tip goes
         through (not pictured)
To bore out the front of the marker, remove all the plastic tabs originally used to retain the marker tip

6. (Power) drill
We only need to drill one hole!

7. 1/16 inch drill bit
To thread through the rubber band

8. A file
If you already have a triangular tapered file as the 5th item,  you can skip this. Basically, you need something to make a small notch.

9. (if you have a serrated edge on your pocketknife, you can skip this altogether) A hacksaw
Just to cut the chopstick


« Previous StepDownload PDFView All StepsNext Step »
15 comments
Dec 27, 2011. 6:22 PMjimtran93 says:
haha, this is great! I have to try this out one day =P
Jan 30, 2011. 2:34 PMpatriots8888 says:
I did this and my teacher flipped
Aug 7, 2010. 12:40 AMFayrine Nina says:
just two words SUPER AMAZING!
Apr 28, 2010. 6:26 PMPantalaimonpan says:
THIS IS SWEET!!!
Apr 30, 2010. 5:03 PMlittlefoxkid says:
my school has Smart Boards...
got a prank for that?...
Apr 3, 2010. 11:32 PMTeensy Doodles says:
hey, i just made one and its AWESOME!
thanks for sharing, i cant wait to pull this on my teachers.
kekekekeke...
Apr 6, 2010. 12:13 PMtazmaniac_37752 says:
Nice trick ,but at the school I went to a kid could get expelled for that LOL but is still a nice one!
Apr 3, 2010. 11:20 PMTCG says:
BRILLIANT!!!

Pro

Get More Out of Instructables

Already have an Account?

close

All Steps Viewing
View all steps of an Instructable on the same page when you're a Pro Member.

Upgrade to Pro today!
14
Followers
9
Author:MadBricoleur
I am a budding Maker bogged down by school. I build because 1. because of my tight budget as a highschooler 2. I don't like to buy what I can build 3. building stuff yourself is an awesome feeling 4. ...
more »