Rainbow + party + favor bags + DIY. Adapted this for invitations last year.
Rainbow Party Invitations! Adorable for boy or girl :D
RAINBOW Party Invitation - Printable File - Personalized - 7"x5" - Print Your Own - DIY
Rainbow table: Cute, inexpensive, and simple idea to brighten up a food or craft table at a rainbow birthday party, Wizard of Oz party, unicorn party, Carebears party, art / painting party, Candyland party, and more!
Party invitations for a Rainbow themed birthday party. Designed and created by Distinctive Party Designs.
Rainbow Birthday Party Ideas
Rainbow party, how have I not thought of it before??
Retro Rainbow Birthday Invitation, Somewhere Over the Rainbow Birthday Party Invitation, Taste the Rainbow Party, Rainbow Invite - Printable by SugarTotDesigns on Etsy https://www.etsy.com/listing/95511717/retro-rainbow-birthday-invitation
Rainbow Gold 1st Birthday Invitation Girl by DesignedbyGeorgette