Question: Make a hidden treasure box for fun and collect coins in it.
Option 0: You can also use jewelrs hinges and screw them to finished product so you can open and close the box.
Option 1: Buy a large chopping block and take a router with a deep boring bit and cut out a large pocket are in the block.Then use a thinner cutting block and cut it down  to sie to make the lid for it.
Answer: 1