Boba is basically tapioca. It is edible and a wonderful way to get sensory goals addressed.
We ordered these colorful Boba pearls on Amazon.com. They were easy to make, and you can easily place them into a milk-based drink (such as coffee and cream for adults) or a fruit juice or ice-cream shake (a kids favorite). If you are not planning on tasting them, play with them and they are slimy, sticky and lots of sensory fun. They can be used for several days by placing them in a zip lock bag and storing them in the refridgerator.