If the little ones are getting restless, visit The Childrens Museum of New Hampshire. With plenty of interactive exhibits and displays, this attraction makes learning exciting.
You'll have sightseeing choices galore when in Dover. The Children's Museum of New Hampshire is a good place to start here, but there are many other fine sights to consider. University of New Hampshire, The Kittery Outlets, and The Links at Outlook are not far from the interactive exhibit for kids and will top off your day nicely.