Sarah James at Instructables made a tutorial for making your own sidewalk chalk at home. This is an inexpensive and easy project to do with your kids this summer! Plaster of Paris and powdered tempera paint are the magic ingredients.
Becky Stern (sternlab.org is a DIY guru and director of wearable electronics at Adafruit. She publishes a new project video every week and hosts a live show on YouTube. Formerly Becky was Senior Video Producer for MAKE. Becky lives in Brooklyn, NY and belongs to art groups Free Art & Technology (“release early, often, and with rap music”) and Madagascar Institute (“fear is never boring”).