One of my sons friends stayed over yesterday and mentioned in passing he'd been assigned to make a mouse trap car for school. I thought about how I had lots of fun making those way back and decided to make one out of scraps off my desk and document it. It's far from the best one ever and unlikely to win any awards, but it does work.
Step 1: Supplies
I used the following:
A mouse trap
4 eye hooks
2 bic pens (the smooth kind)
2 tops from pop cans (for the serious perhaps washers, or otherwise any other bendable metal)
some string (not pictured)
4 CDs/DVDs (expendable ones). Here 3 CDRs and a blank transparent thing from the top of a spindle. I hear DVDs are a bit lighter, but I'm not optimizing that hard.
Step 2: Strip the pens
Pull the front and back out of the pens, making them hollow plastic cylinders.
Step 3: Cut and apply two balloons
Cut the top and bottom off on two of the balloons. Stretch them over two of the CDs, which will later be the back wheels. This will help traction a great deal as CDs are otherwise pretty slippery.
Step 4: Check eye hooks
Assure yourself that the eye hooks fit over the pens. They need to be loose enough to rotate easily, but not so loose that they rattle too much. If not, bend them slightly so that they do. Mine were a bit small and needed to be bent out a bit.
Step 5: Make a hole
Make a hole roughly in the center of one of the pens. I did this simply by screwing one of the eye hooks in and ten removing it. It needs to be large enough to take the string.