Complete Hero Avengers Kit Comes with 9 Bits, 7 hero gear parts, 2 sticker sheets, and the free littleBits Avengers Hero Inventor app Free Avengers Hero Inventor App includes step-by-step instructions and video tutorials that guide kids through creating, customizing, and coding their unique hero identity and gear. App includes challenges to promote creativity and customization using household items. Kids use their smart device to control new abilities, with over 18 in-app activities and coding that keep kids playing day after day. Comes with wearable tech sensors, customizable LED matrix light design, authentic Marvel Avengers sound effects, and in-app block coding. littleBits electronic blocks & hero gear parts can be reconfigured in different ways to create brand-new inventions. Become a Super Hero Kids step into their hero training with customizable inventions like Night Vision, Speed Tracker, and Light Powers. Customizable: Over 18 Activities to help kids unleash their creativity, inventing unique Super Hero identities and powers. Gain STEAM skills: Instruction videos for over 18 activities plus easy block coding in-app. No grown-ups necessary: Kids can easily assemble with step-by-step, in-app instruction videos. Inspires invention: Electronic building blocks snap together to turn circuits into inventions. Requires smart device: Either iPhone (iOS 10.0 or later) or Android (5.0 or later) is required to build and control your Avengers gear. Amazon devices not compatible at this time.