3 years & up. Explore a range of activities and experiences with this exciting Sensory Tray Accessory Kit. These colorful pieces are a great way to promote sensory learning. Use the tray to pour your sensory materials such as sand or goo without a mess left on the table. Encourage children to explore textures, smells, colors, and more using the tools provided. This kit includes 50 Skyscraper Building Cards, 50 Super Topplers, 1 lb (454 g) of colored rice, 4 Junior Goo Spreaders, 10 Squiggle Pipettes, 10 Junior Heart Pipettes, Sand Scraper, and a teacher's guide.