Putting letters, or words in abc order or numbers in order. Cheap and brilliant! Great for skip counting, fractions, putting different three-digit numbers in order., all great ways to practice grade CCSS
Maybe I can use my old stamps with Playdoh instead of this nasty stamp pad .Fun way to practice making words! You could also give students a limited number of letters and a focus vowel, then see how many rhyming CVC words they could make!