This one's going to the nieces, because one of the pieces has a gash out of the edge, but I was happy to complete the whole thing.

Photo paper from Dollar Tree on adhesive foam from Walmart for the puzzle.

Cardstock from Walmart for the box.

Chipboard for the puzzle piece from a puzzle that didn't cut all the way through, so I kept the pieces that came out okay and tossed the rest of it.