we stayed in the 50s section, building 1 (i think) and the location was excellent, imo... although w/the ages of your children, the 70s might be better 'cause that's where the goofy fountains are, and it's equidistant to everything pop as the 50s section...
if you have not already done so, take a look thru the 'new groovy pop century thread' as there is a TON of info, pictures, etc there!