- Sticky tape
- A bowl
- Ping-pong ball
- Rubber bands
- A plastic bag
- Some help from an adult!
Draw a circle on the box and cut it out
Cut off the opposite end of the box
Place the bag inside the box and tape it down so it's airtight
Secure the ping-pong ball with rubber bands from the other side of the bag
Mark the depth of the bag on the outside of the box
Make a small hole on both sides
Loop a few rubber bands together. Poke one end through. Secure the rubber band on one side. Wrap the rubber band around the ping-pong ball and secure the rubber band on the other side.