Dive into ocean exploration with these calming sensory bottles! These sensory tubes provide a fun and tactile way for students to discover the calming rhythm of 2 different ocean forces to help them focus their attention as they calm down. The securely sealed, easy-to-grip bottles are filled with liquid and sea-themed items and can be used to explore the concepts of buoyancy and density.Key Features : i : Dive into ocean exploration with these calming sensory bottles! Provides a fun and tactile way for children to focus their attention and calm down.ii : The Sink and Float bottle is designed to explore buoyancy and is filled with oceanic items that sink or float.iii : The Fast and Slow bottle is filled with two liquids that represent two sea levels with different densities, and includes sea animals that move freely at different rates!iv : These Sensory Bottles are perfect for calm, quiet focus and for on-the-go fun!