Water gel beads have been the core of the Sensory Jungle business since 2015. Water beads. small water based polymer beads, that hydrate over 1000x their original size when soaked in water are an excellent sensory toy for kids. You can use these colorful beads to build a sensory bin, use them in a water table, put them in a water bead launcher or slingshot, and just put them in a bowl and run your hands through them. Water beads give kids the sensory input they need to help regulate themselves.