The first soft, crushable and compressible building system! Jelly Blox is an innovative, unique and patented construction system. Offering gentle, safe and stimulating sensory play for endless hours of engaging fun! The higher you go, the shakier things get! Safety tested: Jelly Blox is made from FDA-approved food-grade materials and is 100% free of BPA - polycarbonates and PVC - Phthalates.