Sensory bottles! They used Voss water bottles. Not sure where to find them but any water bottle will work. use mineral oil for a way to slow down the materials in the bottle. I usually do 2/3 water to 1/3 oil. Can also do just rice and small objects for I-Spy bottles.
Slow-Falling Beads Sensory Bottle Repinned by Apraxia Kids Learning. Come join us on Facebook at Apraxia Kids Learning Activities and Support- Parent Led Group. https://m.facebook.com/groups/354623918012507?ref=bookmark