The making of the chalk will be one fun activity. The using of it will be another. The chalk needs at least a day to dry, so this is a good lesson in patience for the little ones. If you choose to use a deeper mold it will take longer.
Once the chalk is ready to play with hopscotch, tic tac toe, and drawing messages to neighbors will be more fun knowing they made it themselves.
We have DIY Sidewalk Chalk Bundles on sale online while supplies last. You choose the molds you prefer.
- Plaster of Paris
- Warm water
- Tempera paint
- Silicone mold tray
- Popsicle sticks
- Mixing cups
- Measuring cups
Combine 1 ½ cup of warm water with 3 cup of Plaster of Paris in a mixing cup. Mix the two together with the Popsicle stick until you get a thick, soupy mixture. There should be no clumps (Plaster of Paris will begin to harden within 20 to 30 minutes so you will need to work quickly).
Note: If you’re doing more than one color you’ll need to mix them in separate mixing cups. If you’re afraid of plaster drying – do small batches ¼ cup water to ½ cup Plaster of Paris.
Mix in 2 to 3 tablespoons of tempera paint. The more paint you use the brighter your color will be. Be sure that there are no streaks or swirls in your mixture. You want the color even.
Transfer the mixture into your mold once the mixture begins to thicken. Be sure to wipe any spills and leaks with a damp paper towel before the chalk dries.
Let the chalk dry. This will take a day. Keep in mind if using other molds the depth of the mold will determine how long it will take to dry.