At my previous college we had a huge lake in the middle of the campus with tons of ducks, between classes I'd feed them huge bags of hamburger buns I bought at the 99c store because they were so adorable walking around quacking everywhere. Those ducks were so fat by the time I graduated, I don't know what they do without me.
The absolute best experience involving this was this one time I was feeding them like normal and these two baby ducks came out. They were so young they didn't even have feathers yet but rather just kind of soft fur-like pre-feathers. Since they were young and ignorant they came right over to my feet and let me pet them, I almost died of a cuteness overload.