Open Choco Chimps Cereal box art using Adobe Acrobat Reader. Click "Print" under the file menu.
Under Page Sizing and Handling click "Poster". Under Tile Scale play with the percentage. We printed ours at 234% so that it fit on 6 pages. Click tab after you enter your percentage and the preview will show how it is laid out on the pages.
While your pages are printing, paint your cardboard rectangles using brown paint.
Load white cardstock into your printer and click print. Once all the pages have printed out, trim away the white border of each page so that you are left with 6 cereal box pieces.
Line up your cardstock cereal box pieces. Use glue or spray adhesive to adhere the pieces to the front of one of the pieces of cardboard. Place heavy books on top while the glue dries to help the cardstock stick to the cardboard.
Once your glue is dry. Use a straight edge and a craft knife to trim your cardboard so that there is an even border around your cereal box. Our finished costume measures 17 inches wide by 19 inches tall.
Create shoulder straps out of 2 pieces of thick ribbon. Use your glue gun to glue one end of the ribbon to the back of your front piece of the box and the other end to the back of the other piece of the box. Repeat with the second ribbon on the opposite side. The length of your straps and where they are positioned will depend on the size of child who is wearing your costume. Our straps were 12 inches long and positioned 4 inches in from the edge of the box with two inches of the ribbon glued down on either end.
Once your glue has dried, your costume is ready to wear!