Build; Play; And Learn With Cada. With Illustrated Step-By-Step Guidance; Children Can Build The Building Brick Set Together And Then Race Against Each Other. This Process Will Help Children Develop A Sense Of Cooperation And Competition.This Fully Functional Model Features A Boom And Hook Mechanism That Can Be Lowered For Lifting. With 658 Pieces; This Kit Is Perfect For Children Who Love Building And Playing With Construction Equipment.Develop Fine Motor Skills While Building A Fully Functional Crane Truck Model From Scratch.Encourage Imaginative Play With A Working Boom And Hook Mechanism That Can Be Lowered To Lift Items.Explore The Crane Trucks Features; Including Manual Knob Control Boom Telescoping; Bracket Lift; And 360 Degree Boom Rotation.Control The Vehicles Front And Rear Left And Right Manual Driving For Endless Construction Site Stories And Adventures.