Rainbow is a cute handwritten font
Rainbow Macaron
Color Your World
Mixed Notes - Cute Display Font
Baby Rainbow
Notelia
Wind Kids | 3D Layered Cute Webfont for Kids Websites
Sun Summer
Rainbow Pow - Color Bitmap Font
Tropical Crystals - Bold Calligraphy Font
Crush Potato
Beachcomber Font & Illustrations
Christiano
Single line Crystal Darling, a sketch sans and script font
Grigio 3D SVG Color Font
Round Rope - Playful Display Font
Greazly
Rainbow Shadow
Clouds Well - 3d Decorative layered display font
Beach Colorfont
Friday Pop
FLARE - Neon Light Party Font
Bubble Pop Wonky 3D Cartoon Alphabet Lettering ABC Text Font
More Fun Groovy Font