Eggshell Chalk

Eggshell chalk 
Ages 5 and up

Now is the time of year when a lot of us have some leftover eggshells. Don’t throw them away-recycle them into some beautiful chalk instead. By using some simple materials from your kitchen, you will have all the tools you need to make a sidewalk masterpiece. 


  • Eggshells from five eggs-cleaned  
  • 1 teaspoon  flour 
  • 1 teaspoon water 
  • Food coloring 


  • Crush eggshell using a coffee grinder or by placing eggshells in a plastic bag and crushing the bag with a rolling pin. It should be a fairly fine powder 
  • Mix the water and flour so that it makes paste
  • Add a few drops of food coloring into the paste 
  • Add tablespoon of eggshell pieces to paste 
  • Add food coloring until desired color is achieved 
  • Press mixture into a thick log shape. If the mixture is too watery to hold a shape, add a little more flour 
  • Let dry at least 24 hours 

More Fun 

  • April is Geology Month at the museum! Check out these facts about Chalk