Introduce young builders to magnetic construction, sensory exploration and social emotional expression with the comprehensive toddler STEM set, the Guidecraft Grippies® Shake, Build & Curve. Connect large and small sized magnetic rods to each other or combine them with the overmolded metal ball connectors. The variety of rod styles create a unique structural, rounded building experience. This combination Grippies building set is perfect for toddlers to exercise their auditory, fine and gross motor and engineering skills. Details: Includes assorted pieces 70 pieces Magnetic Rods feature a variety of tactile grips for sensory stimulation Includes straight, curved and rattle-like pieces Soft plastic over-molded ABS plastic rods and metal balls Do not submerge pieces in water or wash in washing machine or dish washer To clean wipe pieces with a damp cloth and mild soap, then allow to air dry completely For ages 18 months and up