You can create endless, easy rainbows with just paint and a sponge! Sponge rainbow painting is going to be your new fave.
20+ Unique Painting Ideas for Kids - Busy Toddler
Paint a rainbow sponge painting art - Messy Little Monster
Pinterest DIY Projects: Fun or Fail? - The Collegian, do it yourself projects
Yet another art account — Rainbow friends/orange project Orange, orange rainbow friends fanart
Paint popsicles 🎨 thanks to @Friends Art Lab for this amazing
Rainy Day Rainbow - Recycled Art - No Time For Flash Cards
Fun Activities for Kids - Friends Art Lab
Sponge Painted Fish: Outdoor Summer Art - Happy Toddler Playtime
Pinterest DIY Projects: Fun or Fail? - The Collegian, do it