Crab trap

A small crab trap (not made for big crabs) wich you can use to capture crabs.
The doors open in only one direction so the crabs can't escape.

To assemble the walls I used zip ties but you could just use glue or tape. The doors snap in place with the hinges. To lower the trap down I tied a string to it and then put some bait inside.
If you want to be able to open the roof you need to only attach one side of the roof and then use some clips to hold the other side in place.