Lego is known for putting a lot of though and effort into design and manufacture of their toy sets. For us, the Fire Station set is a hit. If you see the varied uses that a fire fighting helicopter can be put to - you will see that Lego really does a good job. The firefighters themselves get to climb chairs, tables, fly in the air (without the helicopter), ride in trucks - not necessarily fire trucks. They have been known to scale castle walls and fight off dinosaurs and dragons. What's also important is that the toys are really sturdy, they withstand lots of mistreatment without noticeable damage.