LEGO Duplo is a line of LEGO sets designed for younger children. In 2010, they began to release sets based on the Cars series. Sets have been made for all three Cars films, as well as both Planes films, and new sets are occasionally released to this day, with the most recent set releasing in March 2024.
Every LEGO Duplo Lightning McQueen uses the body mold designed for his appearance in the first Cars film. This results in Cruisin Lightning McQueen having a spoiler when he doesn't in the film, and Lightning's Cars 2 design using the wrong spoiler.
Luigi and Guido both have small 95 logos on their side, referencing their Race Team Design from Cars 2. Despite Luigi no longer having the decal in Cars 3, Luigi's Cars 3 Duplo release just reuses this design.
Despite two sets being based on Flo's V8 Cafe, a LEGO Duplo Flo is yet to be released..
Sparky is blue instead of gray like in the Planes films (he was yellow and white in Air Mater).
Strangely, Blade Ranger has his original eye color brown instead of icy blue, as the animators changed it in Planes: Fire & Rescue when Ed Harris joined the cast.