For young children, Dutch Wonderland is the greatest!! My daughters loved that park when they were little. It has a really nice atmosphere - green and shady, with rides that are appropriate for them, fun shows. and now water slides and other water areas that weren't there a few years back - and all the children are similar age. It's just a great family place. Recently, my sister has been taking her young children there, and my teenagers wanted to go along! They feel a lot of nostalgia for that place even though now they've graduated to giant rollercoasters. Also, if you're at Dutch Wonderland, you could spend the next day on the Strasburg Railroad. If you go in the Fall to the Strasburg Railroad, there is the Maize Maze in that area as well (a big corn maze). The other amusement park that is fun for families with young children is Knoebel's Grove, but it's farther. Other families we know have rented the cabins there so they could stay more than one day. Have fun!