2 c water
2 c Plaster of Paris
2 tbsp Tempera Paint (Wet or Dry)
Toilet Paper Tubes with duct tape, taped tin foil, etc, or
any other similarly sized container.
Combine all ingredients
and stir together, then let stand a few minutes. Line a cookie
sheet with wax paper or tin foil, then place your tubed containers
on it. Pour sidewalk chalk mixture into holders, let stand
until somewhat firm. Then remove the tubes and let dry completely
(about 1-1/2 - 2 hours. Throw out any leftover chalk mixture
(WARNING: do not rinse down the sink).
