www.legoland.com/california.htm Lego land sounds like a cool place if your into Lego's. I would love to take my son.
San Francisco, CA is a fun experience - Trolley Cars, Golden Gate Bridge. Try to google. I bet you'll find a lot.
Monterey Aquarium, CA
Sequoia Giant Redwoods, CA is awesome.
Salt Lake City, Utah is fun to stop and Float in the water
Geysers - I think they are in yellow stone National Park.
Keep in mind Weather conditions may be an issue this time of year - lots of snow in some areas.
NY City, Ellis Island, Central Park - Do the Horse buggy ride, Statue of Liberty, Museum of Natural History, Lots of Museums, Soho - very artsy, cool shops, Ice Skating Rink (- It's very central in NY can't remember the name), Broadway Plays, Concerts
You are smart to start your research now and plan your trip. I grew up in NJ.As a child, my family took a family trip out to california and back. It was a great experience. We kept a journal of the trip and took lots of photos.
Have a wonderful trip!!!!
