the fun, surprising, exploding gift box

Step 3 Assembly of false floor

I just used a cereal box from the recycling bin.  I measured the inside of the box and drew a square a little smaller (you want a loose fit)  but before I cut it out I drew in a skirt that would fold down 1 inch or so to elevate the floor above the traps.  I cut it out, taped the sides together and added some christmas wrapping paper to disguise it.  The gift needs to be light so I taped a gift card onto it.

Lastly I cut an opening in the skirt for the thread to pass through.