I made Oobleck myself today to test it out. I got food coloring all over my hands! My hands are still green! Yes, I washed them like 10 times. Do you let your kids take it out and play with it at school? I don't see a point if my kids can't play with it. How do you get the food coloring off their hands? I'm worried they might get it on their clothes. Please help! I want to make it tomorrow! Thanks!