Toy Inventor’s Notebook
TINY TOY CARTESIAN DIVER
Time Required: 20 Minutes
Cost: $1–$2
Materials
» Polyethylene (PETG) tube with vinyl end cap, ½" diameter
» Styrene plastic rod, ½" diameter
Tools
» Grinder or file
» Clip out and tape to your Cartesian Diver!
BACK WHEN CEREAL COMPANIES HAD BUDGETS to do such things, I got to invent some fun “free inside” premiums. It’s a real challenge to come up with a toy idea ...
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