PlayMonster Roominate rPower Plug in your existing Roominate creation to rPower and make it come alive! Set comes only with rPower and 2 cable converters for compatibility with all Roominate kits (building pieces are sold separately) Control motor and light circuits using the brand new and free Roominate app on your smartphone or tablet! With rPower, change how fast or slow a merry-go-round spins, move an elevator up or down, drive a car, turn lights on and off, program lights to blink and more! Teaches important STEM skills: hands-on problem solving, spatial and fine motor skills, self-confidence and creativity