Price: $8/person over 18 months. B1G1 in the Entertainment book. $1/bag of feed (which I highly suggest getting).
My usual strategy is to ride the choo choo when we arrive and when we leave. Don't wait in a line. If there is a line, wait for it to clear out. In fact, if you see a crowd, just wait a couple of minutes before you go around the animals and pace it so you are between groups of people.
Old MacDonald's Farm is my favorite petting zoo because they have a great variety of animals to see, which are separated into their own areas. They have Pony rides, and free roaming Peacocks and Deer. They also have great climbing structures and playgrounds.
Easy Directions: Go down 1960 towards Humble/Kingwood/Deerpark Mall. It is on your left handside a little past 59.
oldmacdonaldshumble.com3203 FM 1960 Road East
Humble, TX 77338-5323