Create one-of-a-kind sensory tubes! Just fill the 3 clear tubes with any of the included materials—glitter, pom-poms and more—and water. Seal each with a twist-on top and cover with a sensory cap. Then kids give the tubes a shake and watch the contents whirl—a great way to help them calm down, self-soothe and regulate emotions! Dishwasher-safe plastic tubes measure 8 3/8" in length.