The Math Cookie Sheets came out adorable, right??? To make the magnets in the build a ten frame, I used scrapbook paper, circle magnets, a circle hole punch and hot glue.The circles are slightly larger then the magnet because that was the size hole punch I had. I will let you know how they hold up. I know you can peel hot glue off of magnets, so they should be easy to fix.
Although these are designed to got with magnets, image all of the ways you can use these….letter tiles, letter beads, or font sort cards. If you have letter object tubs, you could even sort the objects into the letter tins.