POSSIBLE CLASSROOM HAZARD: WATER BEADS
Water beads (also referred to as "sensory beads") are small, super-absorbent polymer crystals that, when placed in water, grow to be about the size of a marble. In recent years, they have been trending as popular additions to sensory bins for children. However, water beads can present a choking hazard, which is dangerous enough, but there is also another problem.
Click the photo above to read more about the potential and real dangers.