This set of Legos has kept my 4 year old son busy for many hours. He loves building all the different vehicles. We have found this set to be perfect for our son who like to explore things by taking them apart. The benefit here... this toy is meant to be taken apart! I love that there are so many options for him to build and I am grateful that I got it for such a good price (around $11). Because he can make so many different things, he is not growing weary of this toy as quickly as he has others. Hooray for Legos!