Watch the magic unfold with Heebie Jeebies Water Marbles-tiny polymer beads that grow up to 100× their size when soaked in water! Perfect for curious kids, sensory play, or as a mesmerizing science experiment, these colorful marbles offer hands-on fun that's hard to put down. Just add water and watch them expand into soft, bouncy, squishy spheres you can explore, bounce, or decorate with.
Whether you're experimenting in the classroom or creating a calming sensory bin at home, Water Marbles are safe, reusable, and endlessly entertaining. Sold individually.
