What are some foods you can't let the kids see you prepare because they'll never eat it again?

I’m getting a couple of the grand kids after school, and thought I’d make some banana bread for them because they like it. But I can’t do it while they’re watching because of the bananas. I freeze bananas when they start to turn over ripe, and use them when I need them. However, after they thaw out and I peel them, they look like nothing so much as a slimy, huge, brown slug….or actually, as though they’d been in somebody’s intestines already and….you know!