Popsicle stick catapult

How to make it

1. 

   1

   Stack the base

   Stack 7 sticks and wrap a rubber band tight around each end.

2. 

   2

   Make the arm

   Stack the last 2 sticks. Wrap a rubber band around 1 end only.

3. 

   3

   Wedge the base in

   Pull the 2 arm sticks apart and slide the stack between them, close to the banded end.

4. 

   4

   Lock it

   Wrap a rubber band in an X around where the stack and the arm cross.

5. 

   5

   Add the cup

   Glue the bottle cap to the top end of the arm. Let it set for 10 minutes.

6. 

   6

   Launch

   Load a pom-pom, press the arm down and let go. Move the stack and see what changes.