FWIW, I took my girls (3.5 and 6.5) a couple of weeks ago, and we got in a full day pretty much avoiding rides (long weekend = hideous queueing). We saw all the shows, a few of the animal feedings, and they spent an age climbing in the Castaway Bay fort area. Older daughter is tall enough for Storm Coaster, but it was not running for a while. Both tall enough for Flume Ride, but with Storm down, the line too long. It's a bit of a hard age for rides - my older daughter is a bit over the MW kids area (with the exception of Road Runner coaster), marginally to short for BatWing, or anything above it so just has Scooby and Wild West Falls. I found Dreamworld the best pick for rides for that age - she could get on MDMC, most of the Dreamworks offerings, rapids, log ride, etc. She hit 120cm about a month after our annual passes expired, so that opens a few more options too.