Thank you notes are a must! A birthday party is a good time to remind children of the importance of showing  their appreciation.   Don't expect a long note, perfect grammar or neat handwriting. Even one sentence, along with their signature is sufficient.  For small children, the parent can write the note and have the child sign it.  Even a one-year-old will usually be able to "sign" the note with their personalized scribble and these notes are especially treasured by friends and relatives!  A wide selection of thank you notes for children are available, so it is easy to find  a design that appeals to your child or matches the party theme.   If your child enjoys drawing and crafts, they can draw pictures and make their own thank you notes.  This can be a fun project to work on for several weeks before the party.  Don't forget to include a birthday photo with the note!