The LEGO City 60421 Robot World Roller-Coaster Park Set is packed with details to inspire hours of imaginative play. Add this LEGO City set to others (sold separately) from the LEGO City range to expand the world of play possibilities. The set also includes a step-by-step printed building guide and 3D instructions in the LEGO Builder appa digital building companion with intuitive zoom and rotate tools that enable kids to visualise models from all angles as they build.Kids can send the 3-car train whizzing through a futuristic video- gaming venue that houses an arcade with toy video game consoles, an e- sports arena, a slushie bar and more. The set also features an articulated mech suit and 8 minifigures for role play and storytelling.