Picture with "I" written on the ground followed by several pieces of heart-shaped chalk, followed by "chalk."

Homemade sidewalk chalk

Making your own sidewalk chalk is a fun and easy project that kids will love. Learn how to make heart sidewalk chalk for Valentine's Day! It's a fun project for kids (or a cute Valentine's gift)! 
Course DIY products
Keyword kids
Prep Time 5 minutes
Drying time 23 hours 20 minutes
Servings 3 pieces of chalk



  • Mix together the water and plaster until well combined.
  • Color the mixture with tempera or acrylic paints or food coloring. Using paints will provide a much brighter color. Mix together until the color has evened out.
    mixing together plaster, water, and coloring in a bowl.
  • Pour the mixture into silicone molds or cardboard tubes like the ones leftover from finished toilet paper rolls. I used both heart shaped ones (which are great for little hands) and tall thin molds meant for making ice cubes for bottles. They both worked really well as chalk molds.
    plaster in heart-shaped silicone molds
  • Allow the plaster to dry completely.
    When I used a lighter plaster, it took a couple of days to harden and dry out enough to take the chalk out of the molds easily. 
    Taking the homemade chalk out of the molds.
  • Unmold and have fun writing on the sidewalk outside.