An easy upcylcled and naturally sourced DIY rainstick musical sensory bottle that will help children learn to self-regulate. This calm down jar is a musical instrument that is fun for kids to watch and listen to. It makes the gentle pitter-pat sound of rain when tipped from top to bottom. Discovery bottles are also great for no mess safe sensory play. Babies, toddlers, and preschoolers can safely investigate small objects without the risk of choking on them.