When I was a child my mom would but stickers from the poison control center on all the cleaners that would be considered dangerous. The stickers had a lime green face making a sick expression on them, with a thick black circle around it with the number to the poison control center on it. Funny what you remember from being a child. I always liked the stickers for some reason so I made an amigurumi Mr. Yucky. The pattern is now for sale in my Etsy shop if you would like to make an amigurumi for yourself. It's only $2.50!