I can't recall if they sell it or not, but if Germany sells Kinder chocolate, get that. It's better and IMO far more authentic "day to day" kids candy than others. (From someone who lived there for several years)
Personally my family and I can't stand Haribo gummi. Yes, they say it's "authentic" but the other brands in Germany are soooooo much better! (like Baren Treff, but they don't sell it in Disney)
Another one I can't recall if it's sold in Epcot, but marzipan shaped treats are very German and are sold for all occasions there...including little potato shapes at harvest time!