If you are looking for a long term, lock it away kinda thing maybe put together a box of 'things from when you were 1'. Buy a few newspapers, take some photos of here, buy different magazines, maybe some US currency and put them in a dry secure box. When she's 18/21 give her the box and she might thing it's funny to see how the world has changed. Of course it would be better her if there were a few stock certificates or mutual fund shares.
