Little-Blue and Little-Yellow

"Petit-Bleu et Petit-Jaune" is a children's book written and illustrated by Leo Lionni. It was first published in 1959. The story features two friends, Petit-Bleu and Petit-Jaune, who are small, colorful geometric shapes. They live in circles of different colors and, despite their parents' warnings, mix and turn green. This symbolizes the idea of friendship transcending color differences.

This book is often recommended for children aged 3 to 7.

Leo Lionni, the author and illustrator, was known for his creative work and commitment to children's education through captivating stories and expressive illustrations.