My son is 39.75 inches without shoes and 40.5 with tennis shoes on. I have heard that the measuring guides are inaccurate at DLpark. Does anyone know which ones are taller then the advertised 40 inches. He has two older siblings who constantly talk about big thunder and splash mountain and really wants to ride those. I was hoping to hear any personal experiences of people who were in a similar situation. Leaving in 40 days. Hopefully he grows a quarter inch in the mean time to make it safe.