DIY Trap

Hey guys,

As u know this is my first instructable,anyway today we will be making a trap so all you need is:

A room with a working door

A grundtal

And lots of rubber band or loom bands

first make a long chain like the one displayed above

tie your chain securely to the grundtal

put the grundtal on the other Side of the door

pull the chain to the front of the door and leave it hanging like shown

If it don't work try it with string