Hello--
Someone else mentioned the show's intensity, and I see that you're getting advice about the hours -- my only advice is to think twice about keeping your 5-year-old up and out too late, especially if you've already had a long day and have a big day planned for the next day. It's easy to underestimate how intense the ENTIRE WDW experience is for kids -- they are having a blast, they may push you to keep going and to keep them out late, but believe me -- you'll regret it if you over-do it. Just friendly advice -- if you think it's possible that you'll do another WDW when your child is older, I would put off things like Fantasmic and Illuminations, etc. These are wonderful shows, don't get me wrong -- but it takes a loooong time to get back to your hotel room afterwards, etc. etc. -- I would just urge caution about not overdoing it.