3 years & up. Craft your own calming sensory bottles using the DIY Calm Down Sensory Bottle Kit! Each kit comes with a selection of glitter and sparkles, along with an instructional sheet. Simply add contents and water, twist the cap back on, and your sensory bottle is good to go. The ends of the bottles are protected by textured silicone caps and are ideal for little fingers to explore. Bottles are refillable and reusable, offering limitless creative possibilities. Designed to encourage focused and tranquil play, the DIY Calm Down Bottles are utilized by parents, educators, and therapists to assist children in self-regulating their breathing and reorienting their attention, as they engage with the mesmerizing swirling contents. Easy to clean; once emptied, bottles can be cleaned in the dishwasher or with warm soapy water. Each bottle measures 8"L x 2" in diameter.