Open out the paper. Now take the two sides without cuts and fold the points back into the center
Fold up those sides and fold the corners in.
Now fold the short sides up over the first set of sides, down the inside wall and ending up with the points meeting on the floor of the box interior. You can glue these points down or even make a contrasting square to cover the floor and glue that down.
Here are some little boxes with covers, made by Elaine. The covers are slightly larger, starting out with a square 1/4" larger than the square for the box bottom.
I hope this tutorial is clear. The boxes are really cute and light, and, with the variety of papers out there in the craft stores, the possibilities are endless.
Tomorrow I'll post more about our crafty get-together!
It was fantastic!