Carabande Action Set and PitchCar Extension are two remarkably similar products, but each is only compatible with its base-game, and they have differing content. Carabande Action SetThis expansion is only compatible with Carabande (but not PitchCar).Contains: One hourglass-shaped chicane straightaway One y-shaped chicane straightaway Two 90-degree curves One jump Expands: Carabande (but not PitchCar) PitchCar L'extension & PitchCar ExtensionThe differences between these two products are their box and content. L'extension comes in a plain brown box with a sticker, and Extension comes in a glossy red box like the PitchCar base set. Neither of these is compatible with Carabande.Contains: Two straight pieces for crossroads Four 'tight' curves (with two sets of railings) One 'bottlenecking' curved rail straightaway Two small jumps, with bridge and track piece to use as jumping-crossroad. * * The original brown-box L'extension did not include the jumps but did include a second 'bottlenecking' straightaway.Expands PitchCar (but not Carabande) Buy Microbadge - BoardGameGeek