How to make a Safe-Box activate with coin to unlock

how to make a safe-box activate with coin to unlock. One of my science project to create a secret unlock safe-box. I hope everyone like this project. Thank you for watching!! Please subscribe to get more interesting videos: https://www.youtube.com/channel/UCNZMEiM-ZMYmEk2CG3mr1_Q?sub_confirmation=1
You need:
- Cardboard
- Rubber band
- Ice-cream stick
- BBQ bamboo stick
Cardboard Measurement:
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(cm = centimeter)
4cm x 10cm = 2 pieces
25cm x 10cm = 1 piece
25cm x 15cm = 1 piece
25cm x 20cm = 2 pieces
55cm x 10cm = 1 piece

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