Grippies Shakers bring kinetic energy and sound exploration to the award-winning toddler STEM platform, Grippies! Connect the two-sized, magnetic rods to each other or combine them with the overmolded metal ball connectors to create a uniquely soothing acoustic building experience. Toddlers can watch the sensory beads rattle their way down the magnetic rods through clear ABS plastic windows. The Grippies Shakers building sets are perfect for toddlers to exercise their auditory, fine and gross motor and engineering skills. Each set includes 30 pieces. Age 18 months+.