Peaceable Kingdom Robot Space Invasion 3D Sticker Activity Poster Book Make a 3-D robot space invadors poster with this engaging activity booklet Create a 16" x 22" poster that will be totally unique using the fold-out booklet and 15 fun 3-D stickers Pop on the included 3D glasses and check out your invasion creation Printed with vegetable based inks on recycled papers and packaged frustration free - naturally! For ages 3 years and over