Fingerpaint

Fingerpaint is a kind of paint intended, as the name suggests, to be applied with the fingers; it typically comes in pots and is used by small children, though it has very occasionally been used by adults either in teaching art to children, or independently. Fingerpaint is non-toxic, and is usually sold in packages of six bright colors.

Fingerpaints are often used on a paper specifically produced for the purpose.

Fingerpaints have been adapted for use in the bathtub as soap: http://www.babyant.com/bt032076.html.