Condensed milk painting. It doesn't drip and is shiny when it dries.
make your own bouncy balls & other science experiments
Good science experiment
homemade slime - clear glue plus corn starch plus food coloring
Paper Towel + Food Coloring Capillary Action Experiments
Spray paint shirts and use tape or stickers for designs.
How to make your own Rock Candy! A delicious science experiment :) Lots of neat things on this site.
Put masking tape with child's name on a canvas. Allow them to paint (or fingerpaint) the entire canvas. Dry. Take off tape.
this site has tons of art projects.
Make your own silly putty! Even better, IT GLOWS IN THE DARK!!!!!