Did it stain anything?

I am making M's birthday cake and we made a test cake this week. I realize that using black and red frosting coloring might be a bad idea with children running around. My husband showed me his tongue this morning and *it* was stained from the black frosting!

Any suggestions on keeping the frosting from getting everywhere? I don't mind if it gets on my lo and I can wash her off before she toddles off to play again. For the other kids, should we ask them to eat their cake outside? We are having a backyard bbq...