18 months & up. Toddlers will create unique building experiences with this fun set of Grippies® Shakers. They can explore sound and movement while watching the sensory beads rattle their way down the magnetic rods through clear plastic windows. By connecting the magnetic rods to each other and combining them with the over-molded metal ball connectors, toddlers can build interesting models. Great for exercising their auditory, fine and gross motor and engineering skills. Compatible with other Grippies® sets.