Small Catapult
This small catapult is about 5 cm x 10 cm and using 1 piece of rubberband.
It is functional, but I made it from scratch and for desktop display.
The wood I used is 0.5cm square rod.
The "pocket" is the cap from laser pointer.
The "wheel" is small chess.
The "wheel axis" is toothpick.
They are sticked together with hot glue.
Cheers.