The ten year olds will LOVE Disney Quest! It is all about gaming! If you have video game junkies like my 12 yr old, it is a must do. The 5 year old is a little trickier. I am not sure about that age group. Basically DQ has a lot of video games (free after you pay admission to get in), Virtual reality games (The wait for the virtual Pirates of the Caribbean is well worth it!), the kids love the make your own coaster thing. There is also a "create it" area that I do not know much about as the boys tend not to go to that area.
It can get pretty crowded on rainy days as that is when a lot of people will head there.
Hope this helps some!
Lynn