Here's one definite advantage of having twins as our "only" children. They don't have older role models to teach them everything. Yes, they do learn stuff from their cousins, the neighbors and the kids in school. They don't have an in-house source to teach them things, though.
I realized this when we saw Santa this weekend. The friend we went with has older siblings. He had a LIST for Santa. It was funny to listen to him. Our girls went up and when Santa said, "What do you want?" The blond twin said she wanted a pink dress. The brunette twin said she wanted a purple dress. That was it!! It never occurred to them to make a long list. One girl asked for one thing and her sister followed. Talk about an easy task for Santa!