I took a 1.5 yr old to universal. There are a lot of play areas, water play areas, also liked dr suess land! You can probably entertain the toddler for hours in that one area
We took our almost 3 year old (she was a month shy) last November. She rode a fair share of items, and Universal has a great parent swap. She also loved the parades. The parks are so colorful they catch the little ones eyes. We had a great time.