today i will teach you to make a 20cm x 20cm crossbow using bamboo skewers, tape, elastic bands, and a straw or empty pen tube.

Step 1: get your ingredients

you will need 4 bamboo skewers, a lot of elastic bands, tape -electrical works best, and empty pen tube or straw.
not to be rude or anything, but you call this easy????
yes. But it's not a crossbow. It's a slinshot with a similar shape to a crossbow. In a crossbow, you get power from the flex of the wood, not an elastic band.
sorry to burst your bubble but this is not a crossbow, it is a slingshot that has the same basic shape of a crossbow.
The picture is unclear