3 years & up. Mix or match police vehicle parts to create ultimate police machines! This unique building set allows your little engineers to use their imaginations to design and create their own police cars, helicopters, or SWAT vehicles. Hidden magnetic connectors make the pieces easy to connect and disconnect so they can build again and again. It's endless "Creativity on Wheels" and more! Included: 3 Pre-designed Police vehicles that can be taken apart and formed into new, unique designs.