Luckily, someone in my family eats fruit snacks as if it was an essential part of her daily diet. We had several fruit snack boxes and some others that I rescued from the recycling bin. I didn't want regular cardboard because it is a little too thick. These work perfectly, but I doubled them to make them stiffer.
clean, empty, cardboard food boxes
Mod Podge or other glue of your choice
Make a template for the sides of your box. Hang on to it because you will use it again several times after your sides are completed. My shape (parallelogram?) was 5 inches across at the top and 3 1/2 at the bottom. The sides were each 5 inches. (Refer to pictures to see this shape.) Trace side template 8 times onto cardboard. Be sure to trace the same piece (your template) every time so every piece is the same.
Make a template for a 3 1/2 inch square. Trace 2 times on cardboard and set template aside for later. On one of the squares, draw another square around it about 1/4 inch (maybe a little bit more) outside of the original square.
Cut off the corners of the double square like this:
Snip about every inch along the edges of the outside square up to the inside square. This isn't that important with a box this shape, but it makes it easier to fold and it is extremely important if using a box with curves. (Your next one!) Go ahead and fold the snipped edges towards the inside. For the rest of the tutorial, I folded them back the other way so that the waxed or shiny sides got covered up. This was so it was easier to see what was going on in the pictures not because it made a big difference.
Tape the bottom edge of a side piece to the snipped edges of the bottom square. Put the side piece edge right up against the folded edge.
Think of the possibilities--homemade heart boxes for homemade chocolate, Easter baskets, decorative holder for spring flowers. Oh, the possibilities are endless!