Reddit reviews Alphabet Letters and Numbers Foam Puzzle Square Floor Mat, 6x6-Inches, 72-Pieces
We found 1 Reddit comments about Alphabet Letters and Numbers Foam Puzzle Square Floor Mat, 6x6-Inches, 72-Pieces. Here are the top ones, ranked by their Reddit score.
I don't know if this would help anyone at all, but when you said 4 for $20 I thought I would share - they make soft foam type mats (so maybe the materials wouldn't work for your purposes) like this for kids play areas. A lot have like puzzle pieces on the inside (like letters, trucks) but not all do...or you could find a way to secure the inside pieces. Maybe not helpful at all, but figured I would share:
Amazon Link to what I am talking about
So you would get 72 6" X 6" squares for $22