Large TROFAST Chalkboard Based Lid Insert (Uppercase and Numbers) | Sensory Table Lid | Alphabet and Numbers Sensory Table Chalkboard Puzzle ComboThese Alphabet and Number Chalkboard puzzle boards fit perfectly into your large IKEA TROFAST bins for your sensory table. A perfect addition to your sensory table for your little to practice the alphabet and learn their numbers and letters! The Chalkboard Base adds a SUCCESSFUL printing component to these early developmental skills. Added engraved dots for both tracing and an added sensory piece on top of the letters. We are the only Patented