Fill a small saucepan with water and bring it to a boil. (Make sure you use enough water to completely cover the tapioca pearls under an inch or two of liquid.)
Add tapioca pearls and cook for 10-15 minutes, until their outer shell becomes soft and translucent.
Pour tapioca pearls into a sieve and run some cold water over them to cool them down.
Divide the water beads into multiple small bowls. Squirt some food colouring into each bowl and stir until the tapioca pearls are completely covered, adding small quantities of water as needed to prevent them from sticking.
Let the water beads sit for 15-30 minutes, until the colours have been fully absorbed.
Once the colours have been fully absorbed, use the sieve to rinse each batch of water beads under cold water in order to get rid of the excess food colouring. Then, let your child play with them!
Keyword sensory play, tapioca pearls, taste-safe, water beads