[Medium Size] over 13200pcs beads, 1.5 times than normal size, grow to 18 mm or so. Meland water start as tiny hard balls but it take nearly 4-6 hours to become bouncy, squishy, and beautiful jelly water beads when you add water.n[Encourages Sensory Exploration] Fully expanded, Meland smooth, squishy water beads create a soothing tactile experience. Ideal for keeping kids busy for hours and make a fun game, great learning tool, science project, or sensory bin itemn[Promotes Learning] Helps kids with color recognition, counting u0026amp; fine motor skill and language development. Parents, teachers, and therapists love these beads for home u0026amp; clinical use.n[Multiple Use] Great for Wedding, Home, and general decorations. Or as a replacement to foot spa refill. Ideal for candle, silk u0026amp; cut flower arrangements, centerpieces and moren[Safety for kids] Nontoxic, colorfast (wonu0026#39;t fade or bleed!), non-flammable. Fully tested and exceeds all childrenu0026#39;s toy safety requirements.n