Larry's and Morton's Airships

Marketing description from Lego.

Take the LEGO® Super Mario™ action into the skies with Larry’s and Morton’s Airships Expansion Set (71427). It features brick-built versions of these 2 Koopalings’ airships. Place LEGO® Mario™, LEGO® Luigi™ or LEGO® Peach™ (figures not included) in the cockpits and ‘fly’ the airships to activate sound effects and fight a virtual cannon battle. Morton’s airship can also be opened up to create a battle zone in a LEGO Super Mario level. Note: the 71360, 71387 or 71403 Starter Course is required for interactive play.

Morton’s airship measures over 23 cm (9 in.) high, 19 cm (7.5 in.) long and 12 cm (5 in.) wide and opens up to create a battle zone where you must topple Morton to defeat him.