It is so refreshing to see grandparents get involved. It really takes a village to raise a child.
Does the poo poo really have to be uncontaminated to work for the project? I guess you could line the litter box with saran wrap. Gordy's science fair projects have not been so elaborate he just started 6th grade though.
Boys do like gross things. He wanted to judge who had the loudest farts after mass last Sunday. He was running around the Church basement telling people to let em rip and roar. I was completely mortified, kids will be kids though.
Good luck getting your kitty poo!