Sensory mats - "Goo bags - recipe for goo. I've had it suggested to use an entire bottle of dollar store hair gel, but this is probably just as inexpensive, and you can make whatever VIBRANT colours you want." Letter writing with fingers or Q-tips.
Designer Dawn has a cute and quick Christmas Tree project using paint chips - A perfect kids craft for Christmas! This is a simple and inexpensive ornament to make with young kids for the holidays. Or use for gift tags.