We saw this colored glue idea over at Pink and Green Mama and tried it about 10 minutes later! Paint with colored glue, awesome!
How to Make Colored Glue:
Fill a half empty bottle of glue with some paint (we used crayola washable paint). Stir with a stick and go.
Visit Pink and Green Mama for more detailed instructions and to take a look at the works of art her children created. They are fabulous!