This was a gift for my 6 yo grandson. He absolutely loves it. With dozens of features and accessories, it provides unlimited imagination potential and provides him hours of engaging fun. The major parts, dozers, backhoes, front-end loaders all have moving parts that he uses in a variety of ways and everything is well constructed. The best part is that it all comes in fold out/fold up container that encourages him to put everything back once he's done playing.
I love candidly watching him play with this set. You can see him thinking through his actions, creating new scenarios and discovering new options. Absolutely the best toy we could have gotten him.