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Scented Sidewalk Chalk

Do your kids love to play with chalk, but get their hands really messy while they are at it? You can cut down on the mess a bit by making your own chalk in deodorant containers. Homemade retractable chalk is easy to use and fun to play with! And since we love essential oils, we decided to make our chalk scented to enhance the sensory activity for the kids.

To be honest, this project has had a couple of flops, but we kept great notes on our tests so you can learn from our mistakes.

The idea behind making the chalk is simple:

  1. Coat the deodorant containers with petroleum jelly so the chalk doesn’t stick to the container.
  2. Mix 1/4 cup (60 ml) cold water with food coloring and essential oils.
  3. Add 1/2 cup (100 g) plaster of paris to the cold water. Mix, then pour into the containers.
  4. Let sit until completely hardened (about 4 hours).
  5. Twist up and have fun!

Now for the things we learned:

  • It is a good idea to coat the inside very thoroughly. You want every area of the inside to have a layer of petroleum jelly. We used about 1 Tbsp. (15 ml) of jelly per deodorant container.
  • Use disposable cups/utensils to create the mixture. Once this stuff hardens, it is a huge pain to get off dishes and utensils. And, honestly, it’s probably not a good idea to pour it down your drain.
  • To get a vibrant color, you will need a lot of food coloring/dye. The water will need to look pretty dark, because the white plaster of paris lightens the mixture quite a bit.
  • Plaster of paris can be harmful if inhaled, so be very careful about not creating dust. It is also a good idea to wear a dust mask and do the mixing and pouring outside where it is well ventilated. The mixture also gets pretty hot, so don’t touch it with your bare hands.
  • Once the plaster of paris and water mix, you don’t have a lot of time before it starts to harden. So work fast, and do only one deodorant container/color at a time. If you are doing multiple colors, you can do some prep work (coat the insides with petroleum jelly, color and scent the water), but don’t mix the plaster of paris with the water until you are ready to quickly mix and pour.
  • When pouring in the mixture, you may be tempted to stack it up on the top until it looks like it might overflow. Don’t do it. In fact, it is a good idea to only fill to just below the lip of the container so the chalk mixture has a little space to expand before reaching the top (and the end of the petroleum jelly coverage).
  • When trying to twist up the chalk initially, it will stick a little bit. First, squeeze the sides of the container to loosen the edges. Then, put your fingers on the inside of the twist dial on the bottom, and use the little groves inside as traction. Apply firm pressure as you twist, but be careful not to break the middle piece inside. Once the chalk is loosened initially, it should be easy to twist up and down like you normally would.

Hopefully we haven’t scared you away from doing this project now that you have read all of our notes and cautions. This really is an easy project, and the kids had a blast playing with the chalk once it was done.

You can also do this with lip balm containers for smaller sticks to use on chalkboards. In fact, you should have a little mixture left over in your disposable cup so that you can fill 1 large deodorant container and a few lip balm containers with the recipe below.

Scented Sidewalk Chalk

Time: 10 minutes active; 4 hours inactive | Difficulty: Easy

Ingredients & Supplies:

  • 1 Deodorant Container (and a few Lip Balm Dispensers, if desired)
  • 1 Tbsp. (15 ml) petroleum jelly (per deodorant container)
  • 1 disposable cup and plastic fork (per color)
  • 1/4 cup (60 ml) cold water (per deodorant container)
  • 5–10 drops essential oil (per deodorant container)
  • Food coloring (you can also use liquid watercolors or tempura paint)
  • 1/2 cup (100 g) plaster of paris (per deodorant container)

Instructions:

  1. Coat the inside of the deodorant container with petroleum jelly. Be very generous, and make sure to apply the jelly everywhere inside, especially the bottom. We used about 1 Tbsp. (15 ml) or more of petroleum jelly per deodorant container. It might help to twist up the bottom piece so you can thoroughly coat it, then lower it back down to coat the sides and middle piece.
  2. Next, pour the cold water into a disposable cup, and add the food coloring and essential oils. It is fun to coordinate the scent of the essential oil with the color of the chalk (e.g., lemon essential oil for yellow chalk, orange essential oil for orange chalk, peppermint essential oil for green or blue chalk, etc.). If you are attempting to do multiple colors and deodorant containers, do steps 1–2 in bulk, but do the rest of the steps for only one container at a time.
  3. Note: If you have a dust mask, put it on for this step. Also, move the project outdoors to finish so you are in a well-ventilated area. Very gently, spoon out 1/2 cup (100 g) of plaster of paris, and add it to the cold water solution. Be very careful not to create dust or inhale any dust. Once the plaster of paris and cold water mix, it will get hot—so don’t touch it with your bare hands until it hardens.
  4. Using a plastic fork, stir the mixture until it is well combined and the color is thoroughly mixed in. You can still add food coloring at this stage, but be quick; you really don’t have a lot of time before it starts to harden.
  5. Pour the chalk mixture into the deodorant container until just below the lip.
  6. Let sit at room temperature for at least 4 hours to harden completely.
  7. Once hardened, squeeze the sides of the container to help loosen the chalk. Then put your fingers on the inside of the twist dial on the bottom of the container, and use the inside grooves as traction. Apply firm pressure as you twist, but be careful not to break the middle piece inside. Once the chalk is loosened initially, it should be easy to twist up and down like you normally would.
  8. To use, twist up and get creative!

Update 4/19/17: We now sell these round twist up containers that would work well for this project.

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