One 8 count Superman Invitations and Thank You Notes Combo. Get your party invitations and thank you notes in one easy click with our Superman Invitations and Thank You Notes Combo. These vibrant invitations are the perfect way to invite your fellow heroes to a city-saving party, and the kind thank you notes will let everyone know how much you appreciate their help. Simply write your party information or thank you message, seal the envelopes with a Superman sticker, and mail them off. Be sure to set aside a Superman Invitation and Thank You Note for your scrapbook!