Going to Disney Jan 1-8 with our 3 year old son. He is currently just over 39" barefoot and about 40 1/2" with his tennis shoes. There are a lot of rides with a 40" height requirement, such as Soarin, Splash Mountain, BTMR, Test Track, Tower of Terror, etc. Just curious if anybody knows how accurate the measurements are at Disney. Is it a true 40" or is it closer to 41" so that they err on the side of caution. Don't want to get him too hyped up to ride just in case he can't. Thanks in advance for your help