These are such a hit in our homeschool house. I have kiddos that are very tactile in their learning. When paper doesn't cut it, I bring these out. You can fill them up with sensory fillers, trace them with your fingers, put kinetic sand in them or even play dough. So many options! The more senses you can engage when learning, the more that information sticks. These help us with that! I recommend getting 2 sets (or even an extra set of vowels) if you are practicing spelling so you have enough letters. :) Happy Learning!