Under water sensory bottle.  All you need is baby oil, water coloured with blue food gel and some underwater creatures. So cheap and fun to make with your class. EYFS

Option Calming Wave Machine sensory bottle (oil, water and fun things) Option water, glue, glitter, food coloring. Option toothpicks/skewers and uncooked grain (rice or barley) for a rain maker. Worked well but Toddler wasn't interested.

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