Marble Maze Gift Box

This is puzzle box is quite a challenge to open, but easy to make. The required parts are 2 pen springs and a ball (3/8th inch or 8-10mm). I have printed this design and everything fits together well with 0.3mm of clearances on moving pieces. No supports are need!!!

Assembling the box is simple. To start glue the two springs into the "push" and "latch" pieces. Put them in their appropriate spots and place the ball in the maze. Next put a little bit of glue on the bottom of the post on the t