Is the mine train measuring stick exactly 38 inches or do they make it higher to account for shoes? I don't want to take my 3 year old to be disappointed if he most likely won't his the height requirement. He's between 37 and 38 inches barefoot but when wearing he's sneakers he's 38. If the poles are actually higher than 38 to acount for everyone wearing shoes, he probably won't make it and I'd prefer not to try.