I wanted to experiment on the mechanism I sketched earlier; tube, elastic band and arrow.
I found myself a small notepad with hard covers and a big red spring.
This was the right equipment for the role of bow.
I then got myself an elastic band and tied on to each sides of the spring.
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I decided to use magnets to avoid arrows falling down from the bag.
Then I will stick a small metal piece on the end of the arrow.
▼ Just like the photograph below.
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