Family Fun Parks and Amusment parks can be lots of fun for the whole family.  I discovered a few great websites that highlight lots of favorite family fun parks all over the place.  Favoritefamilyvacations.com lists a great directory of the most popular family fun parks as well as other family vacation ideas like Dude Ranches, Cruises, Whitewater Rafting, and other such things.  Etodo lists a bunch of family fun parks by state; and there is another site that features all the best family fun parks in Europe. 

All in all - a useful place to start if you are searching for this summer's family fun park destinations.