The sun here is a LOT more direct (or feels it, at least), so I just put sunscreen on the kids in the morning as part of our routine, on the off chance that we spend more than ten seconds outside. So my daughters are becoming familiar with it for the first time (in their memories). My daughter's name for sunscreen? "Sun scream."
I do not correct her.
My son in very ticklish, and my daughter is insanely so. They both used to call it "sunscream." There was plenty of screaming when they put it on.
Somewhat off-topic, but I've been getting that sunblock that comes with a tube of a sort of wax sunblock, almost like a chapstick or gluestick, that you rub on their faces. So it started with my telling them that I was putting on their zebra stripes (because I would stroke it back and forth across foreheads, cheeks, etc.). Then ToddlerPenguin didn't want to be a zebra, so she was a giraffe (I put it on by rubbing it in circles like a giraffe's spots). Then she wanted to be a lion, so I rubbed it outwards like a mane, and across her nose and cheeks like whiskers. It's amazing the difference it has made in getting the stuff on, choosing an animal and letting them pretend I was making them into that animal, in terms of them accepting it.
This isn't a *super* funny thing, but ToddlerPenguin has picked up from somewhere the habit of putting a hand on each of BabyPenguin's cheeks and saying, "Chubby cheeks!" She loves it so much that she does it to everybody. To LittlePenguin, to toys, to me.

The other day, she was chortling and putting both hands on each part of my face. On the ears: "Chubby ears!" On the nose: "Chubby nose!" I'm sure she has no idea what chubby means. I should probably train her out of it before she insults somebody, but it's so charming.