This box contains 6 pieces. 4 pieces are inside the box and 2 pieces are on the lid. Challenge no.1 : Take one of the pieces from the lid, and try to put it inside the box with the lid close. You solved the puzzle if all 5 pieces are inside the box and the lid is closed. Challenge no. 2 : Take the remaining piece and try to put it inside the box also . Yes – all 6 pieces must be inside the box with the lid closed. Do not use strength. If you will solve the puzzle correctly, the lid will be easily closed.