Tie-Dyed T-Shirts...am I nuts?

One of Jake's best friends just turned 4, and we've invited him over for a craft party (for two) this weekend. I've been thinking of all different projects they could make, but have been thinking it might be fun to try tie-dying. They're probably a little young for the project, but I came across this tutorial from the Family Fun site that involves spray bottles (some friends and family members may know how fond Jake is of spray bottles), so I thought this might be fun to try. No doubt I'll end up dying both children pink in the process, but I think they'd be very proud of the t-shirts they could make.

Thoughts? Nutty, or go for it?