Laser Pegs Sound Cubes Includes 2 sound cubes. Sound Cubes require a Laser Pegs power base (sold separately) to record audio playback. 100% compatible with other major construction kits. Laser Pegs construction sets encourage forward-thinking multi-dimensional play Once connected to a power base, Laser Pegs light up a long lasting, colored LED - so your creation lights up as it's built! Because they are open ended they can even be used with other building toys such as Magformers, Magna Tiles, Tegu, Playmobile Laser Pegs are a classic building toy designed to be compatible with all major construction building blocks such as Lego, Knex, Mega Bloks, allowing kids to build anything from helicopters to robots, monster trucks to animals, or dinosaurs to spaceships! Recognized as an award-winning toy & honored with over 46 national awards, Laser Pegs are a perfect building toy for girls and boys! Great for birthday gifts, Christmas gifts, Chanukkah gifts, Easter gifts, STEM, summer camp activities, back to school Our goal is to spark imagination and empower creativity. Educational and fun, we have sets for everyone: Galactic, Archeology, Landmarks, Scientific, Construction, All Kinds of Vehicles, Race Cars, Planes, Trucks, Tractors, Bulldozers, Choppers, Dragsters