Jelly Blox - Stash and StackJelly Blox are a unique building system that kids can squeeze, stretch, and squish! Crafted to aid developmental milestones through tactile, sensory play, Jelly Blox delivers jiggly construction fun. Plus, some blocks are filled with exciting materials like sand, foam balls, mini stars, and mini bricks for added sensory fun! For parents, peace of mind comes standard Jelly Blox are safety tested and ouch free, sparing bare feet if theyre accidentally