Height Requirement At each attraction, signs are posted to indicate specific height requirements and warnings for certain medical conditions. Listed below are all the attractions at both Universal Studios Florida and Islands of Adventure that have a height restriction. If a show or attraction is not listed, then this show or attraction does not have a height restriction and is open to all guests. NOTE: Children under 48' (1.22 meters) must be accompanied by an adult at all times and on all attractions. Universal Studios Florida Revenge of the MummySM- Must be at least 48' Jimmy Neutron's Nicktoon Blast — Must be at least 40' (Persons under 40' can experience this attraction from an adjacent stationary location.) Back to the Future the Ride?— Must be at least 40' MEN IN BLACK?, Alien Attack?— Must be at least 42' Woody Woodpecker's Nuthouse Coaster?— Must be at least 36' Which theme park has these height requirements?