I would do Storm Force Acceletron, Spiderman, Popeye, Jurassic Park River Adventure, Jurrasic Park Playground, Jurassic Park Discovery Centre, Pteranadon Flyers, Forbidden Journey, FLight of the HIppogriff, Ollivander's, Sinbad Show, Poseidan's Fury, High in the Sky Trolley, One Fish Two FIsh, Cat in the Hat, Carro-Seuss-el. Despicable Me, Shrek, Twister, Transformers, Mummy, Disaster, Gringott's, Men in Black, Simpsons, Kodo's and Kang's, Animal Actor Show, ET, Horror Make Up Show, Terminator and Hogwart's Express. You may also want to do the interactive wand experience (not Ollivander's). Mummy and Jurassic Park River Adventure might be too much for the 5 year old.
Two Days.