Collect & Build the Bulldozer, Giant Excavator and Dump Truck to round out the K'NEX Construction Crew Series! Each comes with over 200 parts to build a heavy-duty vehicle, and K'NEXmen drivers are included. There is also a special feature to bring each one to life! The Bulldozer and Dump Truck have realistic motorized movement, while the Giant Excavator makes real construction sounds. You will also get enough parts in each set to build a portion of a house, and if you collect them all, put the parts together to build a giant house on your construction site! Recommended for builders ages 5+.