How to Make Your Own Sidewalk Chalk with Eggshell Powder
Being a teacher as well as a grandmother, I thought this was a GREAT way to use some of that calcium powder you made with eggshells to make your own sidewalk chalk! It's fun! It's cheap! It's easy! Here is the article again, in case you need the directions: "How to Make Your Own Calcium Powder"
Or, maybe you aren't up for making sidewalk chalk quite yet? Here are 7 other ways to use calcium powder!
NOTE: I haven't actually tried this (yet), but it sounds like it will work. I'll update you when I get my grand daughter here for a visit! :-)
FTC Disclosure: There are affiliate links scattered throughout this article. If you click through and make any kind of purchase, I may receive a small commission at no extra cost to you. Thank you--Heidi
How to Make Handmade Sidewalk Chalk Using Calcium Carbonate
Don't you think this is a great project to do with your child or grand child?
Ingredients for Sidewalk Chalk
1. Calcium Powder from Eggshells (see links to article for simple directions) OR, you can use calcium carbonate powder.
2. 1 tsp flour (for one stick of chalk)
3. 1 tsp hot water (for one stick of chalk)
4. A large spoon (soup spoon)
5. food coloring of choice
6. paper towel
Directions for Making Sidewalk Chalk
- Make your eggshell powder (calcium powder) following the directions in this article:
- In a bowl, combine 1 large spoonful (soup spoon size) calcium powder, 1 tsp flour, a drop or 3 of food coloring (not too much), and 1 tsp hot water
- Mash the mixture together well--you can use the back of the spoon to help out, and mix thoroughly.
- When it becomes a good paste, roll it into a stick.
- Wrap the stick in a paper towel and let dry for 3 days
- Have fun on the sidewalk or cement! (Do not use on a chalkboard)
I found these directions from the Washington Education Department, and am planning to do this experiment with my students this year! I can hardly wait! Note: I have not yet tried it, and I will let you know how it goes when I do. Here is an awesome PDF for directions for students along with pictures. And if you are a teacher, there is even a little quiz at the end! :-) Student Directions for Sidewalk Chalk