Is Harry Potter worth it for a 10 month and a 5 year old?

I suspect the 10 month won't get much from any amusement park quite yet. I guess how much your 5 year old would get out of that section depends on how much into Harry Potter s/he is. S/he will probably be too small to ride the Forbidden Journey and the Dragon Challenge rides, but might be able to get something from the rest of the park area. Getting some butter-beer, walking around the stores, etc, may be fun for a 5 year old.