New Sensory Set 2 for Modular Activity Board! This set includes: Trackball: Black and white balls that roll in place. Color Wheel: Colors that spin around and around. Switches: Textured switches that flip and click. Mix and match your discovery! A modular sensory toy, PlayTab lets you build a unique experience packed with fine motor challenges, visual fascination, cause-and-effect discoveries, and more. They all magnetically snap onto the tablet (sold separately) any way you want. The classic activity board becomes more versatile and more open-ended with PlayTab.