These fun printable "ticket" party invitations double up as envelopes.
Print, cut out, then choose whether to fold up with the illustration on the
outside or inside. If the illustration is on the inside, you can address the
folded envelope and send it through the post! You will need to write details of
your party on a separate piece of card or paper and include it. If the
illustration is on the outside, simply write the details on the inside! You can
use the small illustration as a "sticker" to close up the envelope if you wish.