Reply letters should not be posted back to us; we hope that you will keep these as mementoes of your child’s first writing! The premise of the posting the reply letter under the sofa is that using ‘cat stamps’ from the sticker sheet, your pet or an animal on the street will collect the letter from under your sofa and deliver it back to Banjo (much like how the tooth fairy works!). You can reply to any questions your child asks by leaving replies to them on Banjo's notecards, downloadable here!