My friend, Dr. Silvia Bunge, needs children for a research project involving children's cognition. They've got some very promising preliminary results (including significant increases in IQ after an 8-week after school program), but need to recruit more children. Here's the link to their lab. It's in Berkeley, CA on the UC Berkeley campus. Quinn's too young to do this, but I thought other readers might have kids who would fit their needs.
Disclosure: I might be working with the Bunge Lab, so I have an incentive to be nice to them.