The round bottom flask has a solution of
baking soda and water colored red.
Not exact matches
It's science in it's purest form: flour, corn starch,
and baking soda;
water, white vinegar, liquid dish soap,
and liquid
water color.
Mix up a big batch of liquid chalk (cornstarch, vinegar,
water,
baking soda,
and food
coloring), then send kiddos out to the driveway to create.
The
color will eventually fade, but making a thick paste of
baking soda and water and scrubbing the stain can help.