The Science Behind the Fun
Glue is made up of long chemical chains called polymers. When a cross-linking chemical is added, these chains stick together, creating slime.
In this experiment, the contact lens solution's boric acid and baking soda combine to make a cross-linker for the glue. And air bubbles in the shaving cream get trapped in the mixture, making the slime foamy.
- Let your child try her hand at color-mixing.
- Ask your child how he would make a double recipe or a half-recipe of slime.
- Encourage your child to think of other safe ingredients she could add to her slime to change the texture, like corn starch or lotion. (Hint: For the best results, always add the contact lens solution last after everything else has been mixed together.)