This LEGO Super Mario set features two Mario Kart toys, including Baby Mario in his Biddybuggy and Baby Luigi on his Tri-Speeder. The playset comes with six buildable balloons (three red, three green) for balloon-busting battles and racing action. Players can launch shells to knock over the balloons during gameplay. The Biddybuggy and Tri-Speeder are compatible with LEGO Mario, LEGO Luigi, or LEGO Peach figures (sold separately), allowing interactive play with sound and visual effects for honking, drifting, and other Mario Kart actions. Designed for ages 8 and up, the set works as a standalone playset or can be combined with other LEGO Super Mario sets (71439, 71440, 71441). Each toy car measures over 2 inches (5 cm) high, 3 inches (7 cm) wide, and 4 inches (10 cm) long. The set provides a mix of racing and battle gameplay for fans of the Mario Kart series.