Acrylic Loose Parts Gems

These little gems are the cutest! We use them so many ways. As math counters, on the light table, write on them with reusable markers, etc. Lately our favorite way is to tape a number on the back. After digging to find a gem, my son comes up with an addition problem that adds up to the gem number. Other ways we use them in math include double the number, add to a mystery number, etc.