Image Item No. Description By  3941pb28  Brick, Round 2 x 2 with Axle Hole with Red Question Mark and Dark Turquoise Pixels on Black Background Pattern (Sticker) - Set 71708 Catalog: Parts: Brick, Round, Decorated 17  3941pb29  Brick, Round 2 x 2 with Axle Hole with White Question Mark and Dark Pink Pixels on Black Background Pattern (Sticker) - Set 71710 Catalog: Parts: Brick, Round, Decorated 18