This is a great rainbow sensory bin for a mixed age group, especially if you want a sensory material that can be used over and over again. We previously made an edible rainbow sensory bin which is perfect for toddlers (if you don’t mind a bit of a sugar high), and though I wouldn’t advise eating raw barley, at least I knew if a few grains were tasted that they wouldn’t pose a choking hazard. (Though they would probably lead to an upset belly.)
Repeat with each color of the rainbow – for a total of 6 lbs of barley (1lb per color).
I spread the dyed barley out on several trays and cookie sheets to dry overnight.
I used a large “under the bed” storage container for our sensory container. You’re going to want a flat bin that is wide enough to make stripes of each of the rainbow colors.