Build a magical world with the LeapBuilders® Shapes & Music Castle™! Build, create and learn with this interactive 30 piece castle-themed block set. Kids can build using the easy-to-hold building blocks and double-sided learning blocks that feature instruments. Insert the 10 double-sided learning blocks into the interactive Smart Star™ cube and it will respond with educational songs,fun sounds and encouraging phrases about shapes and instruments that enhance building play with learning content. Build on the Smart Star™ cube to trigger sounds. Press the question button on the Smart Star™ to hear requests to find specific blocks in the set. The music button plays four learning songs and five melodies. Use the learning blocks from other LeapBuilders® sets in the interactive cube to unlock additional content responses. Get building with smart blocks for smart kids. Batteries included for demo purposes only, new batteries recommended for regular use.