In the class we learned how to make homemade playdough and colored our own playdough. We also got a demonstration on how to make homemade crystals. Each student took home a jar with a recipe and some epsom salts so they could try the experiment at home.
We have enjoyed some great lessons and learned so many new things this week. The students have enjoyed each and every lesson.
Here is a recipe for homemade playdough:
- 1 cup water
- 1 tablespoon vegetable oil
- 1/2 cup salt
- 1 tablespoon cream of tartar
- Food coloring
- 1 cup flour
- Combine water, oil, salt, cream of tartar, and food coloring in a saucepan and heat until warm. Heating the dough helps to bind the ingredients so it won't be sticky.
- Remove from heat and add flour.
- Stir, then knead until smooth. The cream of tartar makes this dough last 6 months or longer, so resist the temptation to omit this ingredient if you don't have it on hand.
- Store this dough in an airtight container or a Ziploc freezer bag.
This is a Recipe for making Crystals
- In a cup or small, deep bowl, mix 1/2 cup of epsom salts (magnesium sulfate) with 1/2 cup of hot tap water (hot as it will get from the faucet).
- Stir about a minute to dissolve the epsom salts. There will still be some undissolved crystals at the bottom.
- Place the cup in the refrigerator. The bowl will fill with needle-like crystals within three hours.
- Don't use boiling water to prepare your solution. You will still get crystals, but they will be more threadlike and less interesting. The temperature of the water helps control the concentration of the solution.
- If you like, you can place a small object at the bottom of the cup to make it easier to remove your crystals, such as a quarter or plastic bottle cap. Otherwise, carefully scoop the crystal needles from the solution if you wish to examine them or save them.
- Don't drink the crystal liquid. It's not toxic, but it's not good for you either.