Krumples Bop & Pop Sensory Toy preschool build + Learn about potential and

+ Learn about potential and kinetic energy and how gears and springs function in different mechanical devices

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Dozens of engaging interactive elements provide hours of storytelling and exploration

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Krumples Bop & Pop Sensory Toy preschool build + Learn about potential andDouble the fun, double the play! BOP & POP is the next evolution of the beloved Krumples sensory toy, now designed with two connected pieces that move in unison: when you squish one, the other pops up! Made from food grade silicone, it's safe for curious hands and mouths while providing endless tactile engagement. Encourage baby's motor skill development, cause and effect learning with hours of satisfying sensory play. From Smart Toys and Games for