This activity falls in the Cognitive domain CD29. These sensory bottles can be used during quiet/nap times when your infant is not yet ready to sleep. Exploring these sensory bottles will provide cognitive growth and development in your infant.
DIY Calm down sensory bottles are used for portable no mess safe sensory play for babies, toddlers, and preschoolers, to calm an anxious child, to help children learn to meditate, and as a "time out" timer for kids. This article includes links to resources available to help learn more about their uses and how to make DIY sensory bottles.