I remember as a child being convinced I would be blind when I grew up. I read every book I could get on blindness and how blind people coped. I practice walking with a cane with my eyes closed, tried to learn braille, would harness up the neighbor dogs and pretend they were seeing eye dogs, etc.
I also remember devising a game for me and my friends where we sit in the woods with bare arms spread open and see who could last the longest while the mosquitoes bit us. I always won.