This 201-piece BRIO Builder Activity Set (34604) is a premium construction toy and engineering kit that encourages imaginative building and hands-on problem-solving. This versatile tool playset includes wooden beams and plastic components — cogs, gears, wheels, nuts, bolts, a screwdriver, hammer and wrench — enabling kids to design moving models, vehicles and machines. This open-ended construction set supports hands-on STEM play and helps develop hand-eye coordination, fine motor skills and spatial thinking through repeated building and experimenting. This compact set suits preschool and early school-age builders (3+), offering durable parts and clear creative possibilities for playtime, maker projects and classroom activities.