Compatible with BIG Red, BIGmack, BIG Step-by-Step, Jelly Bean and Jelly Beamer; LITTLEmack, LITTLE Step-by-Step and Step-by-Step with Levels; iTalk2 and iTalk2 with Levels and AirLink Cordless Switch, these tough, clear plastic caps make protecting, viewing and changing symbols easy!

No adhesive necessary as symbols stay in place easily.