Safe Slime

What You'll Need

• ½ cup white school glue (like Elmer's)
• ½ tsp baking soda
• 1 tbsp contact lens solution (must contain boric acid — check the label)
• Food colouring (optional)
• A mixing bowl and a spoon or craft stick
• A zip-lock bag or airtight container to store it

Make It Together

1. Pour the glue into the bowl. Add a drop or two of food colouring and stir.
2. Add the baking soda and mix well — your toddler can stir this part!
3. Add the contact lens solution and stir vigorously. The mixture will start to pull away from the bowl.
4. Knead with your hands for 2–3 minutes until it becomes smooth and stretchy.
5. If it's too sticky, add a tiny drop more contact lens solution at a time.
6. It's ready when it stretches slowly without breaking!

Let's Play!

1. Stretch it slowly and let it drape — "How long can you make it?"
2. Poke it, squeeze it, and flatten it into a pancake.
3. Fold it over itself and watch the colors swirl together.
4. Press small objects (buttons, googly eyes) into the surface and pull them back out.
5. Talk about how it feels: "Is it cold? Slippery? Stretchy?"

What They'll Learn