3. Water. Yeah, I know, 'duh', but not for drinking; for DIY water colors!
And speaking of paint....
4. Add unsweetened Kool-Aid to latex paint for a colorful surprise.
5. Hair. Kool-Aid will add a hint of color to dark hair and a lot of color to light hair, so says this tutorial. The results can be lovely.
For a few more Kool-Aid secrets, check out rd.com and for a cool photo essay on dyeing yarns, vist figandplum.com.