Love the rainbow, though I'm much older than 3! Put a bad pun and the party details and it's perfect!
* Cardboard Box Punch-Out Birthday Party Surprise Board - using box and cups instead of poster board and lunchbags
Hey, I found this really awesome Etsy listing at https://www.etsy.com/listing/97327033/rainbow-invitation-with-cloud-digital
Rainbow Punch Pinata-I like this SO much better than the mad scramble for candy where someone always winds up crying and/or hurt
Construction party ideas: Food, decor, games and favors! | Chickabug
Free Rainbow birthday party printables-- includes mini candy bar wrappers, birthday sign, banner, water bottle labels, cupcake circles, gift tags, etc.
Rainbow invitation Printable Colorful by TheLovelyDesigns
jars of crayons on the table with cute rainbow coloring pages for anyone interested in coloring.
Rainbow Seeds Free Printable - Such a fun activity for St. Patrick's Day!
Rainbow party food #rainbowparty