Using a glue stick, glue the flap of the first envelope to the front side of another envelope. Continue adding envelopes until they are all adhered together into an accordion. Press envelopes between a few heavy books. Let dry.
Cut out two cardboard pieces 1/2 inch larger than your envelopes. Cut your cover paper. The cover paper should be at least 1 inch larger than the cardboard on all four sides. Trim each corner at a 45 degree angle.
Spread white glue on the cover sheet and smooth it out evenly across the paper. Place your cardboard in the center of the sheet and fold the flaps over the cardboard edges carefully.
Center the ribbon on one of the cover sheets and glue it to the cardboard. Spread glue over the front side of one of the end envelopes in your accordion. Turn it over, center on cardboard cover, and press together.
Glue the second cover sheet to the front side of the last envelope on the other end of the accordion. Clean up excess glue so you do not accidentally glue any of your pages together. Press the whole assembly between some heavy books and let dry. Kids can use it for stickers, tattoos, collections or organization projects.