An electronic free weight with built-in fitness coach leading 65 kid-friendly exercises, from jumping jacks and arm curls to extended routines based on themes from Let’s Surf to Dance Party. With 22 grooving musical tunes and twinkling colorful light shows, few can resist the urge to get moving. That’s the magic of Jammin’ Gym. Moving to the music develops listening skills and the ability to follow oral directions, boosts brain function, and enhances balance, coordination, and gross motor skills. Ideal for group activities including family fitness time. Jammin’ Gym measures 3″diameter x 8″H. features rubber grip and tether, and requires three AAA batteries, included.