Instructables
Picture of Bouncing Snowflake
A decorative toy based on stick slip motion.  The wooden snowflake is attached by a spring to a wooden sleeve, which rides on a metal rod.  Slide the snowflake to the top of the rod, and with a flick of the finger, the snowflake takes a surprisingly long time to bounce its way down the metal rod.

I made this at TechShop www.techshop.ws

Step 1: Materials and Equipment

Vector drawing software (I used CorelDRAW)
Laser cutter (my TechShop has a Trotec Speedy 300)
Drill with appropriately sized bit (matches spring diameter)
5 Minute epoxy
Coarse sandpaper
3" x 8" x 1/4" poplar board
14" long 1/8" diameter stainless steel rod
Spring from a retractable pen

This instructable assumes some basic familiarity with CorelDRAW and a laser cutter.

Step 2: Designing the Base

Picture of Designing the Base
The base consists of five wooden discs of varying diameter stacked on top of each other.  Start by drawing two concentric circles, the first 2.5" in diameter and the second 1/8" in diameter.  This will form the bottom-most disc of the base. 

Make sure that you set the line width to hairline so that the laser cutter knows that you want to cut these lines and not just engrave them.  I also use the convention here of red lines mean cut, and black images mean engrave (this information is used when setting up the laser cutter).

Step 3: More Base Discs

Picture of More Base Discs
Now draw four more circles with diameters of 2", 1.4", 0.4", and finally 0.6".  Add a 1/8" diameter hole centered on each of these to form the remaining discs for the base.  Note that I packed the little discs in around the gaps between the larger discs to use my wood more efficiently.
 
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togo19191 year ago
AND... I'll probably be way-lazy and use an extra ring instead of drilling part-way into the graphic piece - the extra ring will be thinner. I'll laser-through a hole for the spring.

You like Corel, eh? I'm really digging the CTRL-D function - Duplicate. It will increment angle, size, displacement, etc. Fun to play with...
togo19191 year ago

JOE! Man of the HOUR!!

This is very cool!!!

I am going to copy this for my Cub Scouts. I'll put some type of CubScoutY graphic on it. We'll build them and have races!

Look out - I'm following you, man...