Construction Accessory Kit, for Bit Ozobot Accessory Kit (Construction Series) for use with Ozobot Bit only. Ozobot sold separately. Create challenges and DIY activities, or even design your own games to share with all your friends and the amazing Ozobot community. Comes with 4 construction extensions, 2 DIY skins, 6 blocks, 1 pop-out sheet, 1 accessory sticker sheet & 1 block sticker sheet