I visited Madurodam by bike (easy to get to and plenty of space to park the bike). It was an extremely busy day as the weather was sunny but not too hot! which is what you want, because it can really heat up in there! Admission for an adult is around 13 euros which is reasonable I think but you have to be willing to spend a solid few hours there to get the moneys worth! I visited with children so for them they really loved the miniature cities, but after a while they were bored so it was lucky the playground had recently being renovated and was great for entertaining the kids!! I found it interesting just roaming around and locating the different parts of the Netherlands, we spent 5+ hours there!! don't spend that long! but definitely make the trip to see it, its a well worth attraction to visit in the Hague.
This review is the subjective opinion of a TravelPod member and not of TravelPod.com.