Teach Preschool | All about water beads: I have some of these I have yet to use. I got them at Dollar Tree. You can also get them at Wal Mart, Michaels, online. They are in the flower arrangement section or garden section. They are not toxic and environmentally safe. That said kids need to be watched. The are a great sensory tool in water, shaving cream, on a light table, ect. If you put clear ones in water they disapper and can only be found by touch (good for learning 5 senses).