Make Your Own Sidewalk Chalk With Radical Rick on Extreme Scienc - Spokane, North Idaho News & Weather KHQ.com

Make Your Own Sidewalk Chalk With Radical Rick on Extreme Science

Posted: Updated:

What you will need:

  1. Plaster of Paris
  2. Water
  3. Tempera paint
  4. Mixing bowl
  5. Mixing spoon
  6. Plastic popsicle molds or other type of molds
  7. And eventually……… a sidewalk to decorate
  8. Adult supervision

Procedure:

1) Pour some of your plaster of paris into your mixing bowl.

2) Add water and paint

3) Stir until thoroughly mixed. Do not stir too fast as you do not want to create a lot of air bubbles

4) Try spraying a little bit of non-stick spray into your molds if you are using plastic molds. The ones we used to record this segment worked but were a little harder to get out than they have been in the past so adding a thin coating of non-stick spray would probably help.

5) Carefully pour your mixture into the molds. I like to use the round popsicle molds but you could even get creative and use plastic Easter eggs for molds and end up with egg shaped chalk.

6) Let harden. This may take a couple of days. If you try to get them out too soon, they may break. They will also shrink slightly as they dry which makes them easier to get out of the molds.

7) Once your sidewalk chalk has hardened, you may remove each of them from the molds.

8) Go get creative and decorate some sidewalks!

PLEASE NOTE: I had a hard time getting my chalk out of the molds this time. Typically, they will come out fairly easy once they have completely dried but I had a hard time with this batch and am not really sure why. I may have been a little impatient but in order to save you frustration, you may want to try spraying some non-stick spray into your molds or roll up some wax paper to insert into the mold prior to adding your plaster!

What is going on?

Plaster is actually a building material typically used for coating walls and ceilings. Plaster of Paris is sold in a powder form and is intended to be mixed with water to form a paste. Mixing your plaster powder with water will release heat through crystallization and your hydrated plaster will then harden as it dries out. Plaster is relatively soft after it dries, which makes it easy to work or sand after it is dry. These characteristics make it similar to chalk, or sidewalk chalk. By adding paint to this mixture, we can color the plaster to make your own custom sidewalk chalk!

Try this:

As you fill your various molds, you may end up with some hydrated plaster left over but not have quite enough to fill another mold. Go ahead and pour it into a mold and continue to do so with each color you make so that you will end up with a “rainbow” piece of sidewalk chalk as well.

Radical Rick
Extreme Science
www.ExtremeScienceFun.com
509-892-7621

  • Success by 6More>>

  • Michael Anderson Elementary Wins Book Drive School Challenge

    Michael Anderson Elementary Wins Book Drive School Challenge

    Tuesday, August 20 2013 1:08 PM EDT2013-08-20 17:08:44 GMT
    Michael Anderson Elementary on the Fairchild Air Force Base took the Challenge- so did Windsor Elementary in the Cheney School District. Their mission -to collect books for the Success By 6 Book Bank.>>
    Michael Anderson Elementary on the Fairchild Air Force Base took the Challenge- so did Windsor Elementary in the Cheney School District. Their mission -to collect books for the Success By 6 Book Bank.>>
  • Got A Pre-schooler? Pick Up a Kindergarten Readiness Calendar

    Got A Pre-schooler? Pick Up a Kindergarten Readiness Calendar

    Tuesday, August 7 2012 7:48 PM EDT2012-08-07 23:48:39 GMT
    Got a Pre-schooler? Pick up the Kindergarten Readiness Calendar at any local library! Getting ready for Kindergarten starts long before your child sets foot in their Kindergarten classroom! That's>>
    Got a Pre-schooler? Pick up the Kindergarten Readiness Calendar at any local library! Getting ready for Kindergarten starts long before your child sets foot in their Kindergarten classroom! >>
  • Young Children Learn from Everyday Life

    Young Children Learn from Everyday Life

    Wednesday, August 10 2011 12:26 PM EDT2011-08-10 16:26:51 GMT
    They say kids don't come with an instruction manual, yet parents, especially new parents are bombarded with all kinds of advice from friends and family. There are books and websites offering endless lists, tips and tricks for parenting.  Jill Johnson, Communications Specialist for Family Resources at Community-Minded Enterprises and Success by 6 Board Member says you can teach your children with simple, everyday activities.>>
  • Want Your Child to Love Learning? Let Them Play!

    Want Your Child to Love Learning? Let Them Play!

    Wednesday, February 9 2011 2:08 PM EST2011-02-09 19:08:57 GMT
    Want your Preschooler to Love Learning? Let them play! Gwendolyn Haley, Spokane County Library District Youth Services Manager, and Success By 6 Board Member, says playtime is the most important part of a preschooler's day.>>
  • Your Baby: 2 Months

    Your Baby: 2 Months

    Tuesday, March 13 2012 5:59 PM EDT2012-03-13 21:59:50 GMT
    Our Success By 6 Pediatrician, Dr. Mary Kay Wagner, host of our "Your Baby" series discusses the finer points of living with a 2 month old baby. >>
  • Your Baby: 4 Months

    Your Baby: 4 Months

    Tuesday, March 13 2012 6:19 PM EDT2012-03-13 22:19:00 GMT
    Our Success By 6 Pediatrician, Dr. Mary Kay Wagner, gives parents an idea of what they can expect of their 4 month old baby.>>
  • Your Baby: Six Months

    Your Baby: Six Months

    Tuesday, March 13 2012 6:46 PM EDT2012-03-13 22:46:36 GMT
    Our Success By 6 Pediatrician, Dr. Mary Kay Wagner, says child proofing the house is a priority in a house with a six month old baby.>>
  • What Book is just right for your New Reader?

    What Book is just right for your New Reader?

    Thursday, July 21 2011 4:31 PM EDT2011-07-21 20:31:53 GMT
    What book is just right for your new reader? Mary Ellen Braks, a Youth Services Manager with  the Spokane County Library District says it's an exciting time when your child is starting to learn how to read.>>
  • Local Community ConnectionMore>>

  • For Women Only

    For Women Only

    A collection of news, health information, fashion tips and more all in one place and for women of all ages.>>
    A collection of news, health information, fashion tips and more - all in one place and for women of all ages.>>
  • Success by 6

    Success by 6

    United Way Success By 6® is the nation's largest network of early childhood coalitions, focused on improving school readiness through community change.>>
    Success By 6® is focused on improving school-readiness through community change.>>
  • KHQMD

    KHQMD

    KHQMD - presented by Rockwood Clinic and Deaconess Medical Center - Your Health, Right Now>>
    KHQMD - presented by Rockwood Clinic and Deaconess Medical Center - Your Health, Right Now>>