In August, our son was tall enough to go on Dinosaur at AK, but was literally a piece of paper width too short for Soarin and Test Track. A CM told us if we wanted, we could use our judement and let him ride Test Track, but I didn't push it. I figured he could do it on our next trip in January. We did get little business card sized cards that said something about him not being tall enough but that he would be soon and could ride the rides then. He loved them and is so excited to finally be tall enough to join his big brother and parents on the 40 inch rides. We measured him a couple weeks ago and he's grown almost 2 inches. His brother is sure going to miss the second rides he got to take with each parent while using the baby swap cards!