J.S.
We went to Memphis in March. The Zoo was incredible! If you have a STL Zoo Membership, you can get in for half price (although for my family of 5, it was still pricey). You could probably spend the whole day there. Our kids loved the trolley-we rode it all the way around twice. The kids museum was small-definately not the Magic House, but for a toddler, it would probably be lots of fun. We did see the ducks-the kids enjoyed it, but people started lining up 30-45 minutes before to get a good seat to see the ducks.