I adore these origami notepaper sets by Lollipop Designs. They are designed to be written on the reverse side of the sheet then origami folded and popped into the envelope provided. They are a fun way to write a secret message to someone special in your life and an equally fun surprise for the receiver to get in the mail. Each set comes with 10 sheets and envelopes along with step by step instructions to make an owl, cat, fox, mouse or badger. Also available here.