small and furry.
Many zoos also raise their prices for the summer season. If you go early enough in the spring, you'll still get the off-season discount. Plus, the zoo will be less crowded and you'll have more time to observe those playing animals.
A trip to the zoo is a great way to get out and get moving. You'll probably have walked a few miles by the time you're done circling around. Take your time and let the little ones rest when they need it.
Don't let a little rain scare you off. Many animals have no problem going out in a light shower and even love to play in the rain. Kids are the same way. Just bring enough umbrellas to avoid a fight.