Trick Gift Box

I designed this as a fun way to give a gift card or cash as a gift. It is a trick gift box. When initially opened it appears to be empty. However, you'll have pre-loaded it with a gift. It will fit gift cards, money, and other small items. When opened from the regular position it will always be empty. To load it, it must be opened from the special slider position. Please be sure to read through the printing and assembly instructions before printing (no really, it'll help prevent frustration).

You can see a video demo of the box here: https://youtu.be/5p3jeHYH_Ss

UPDATE: I've added a 3 piece version of this model for people that may be struggling with the 1 piece print tolerances. The body can be printed in 2 pieces and the slider as a 3rd piece. The slider can then be placed on the bottom, and the top glued to the bottom to hold it all together. Be sure your slider moves freely before applying glue. The instructions below can be followed for assembly.