César's Cerulean Surprise

Celebrate diversity, math, and the power of storytelling!

A math picture book series for preschoolers and kindergarteners with relatable stories that reflect little kids’ everyday experience.

César wants to borrow his little sister Gabi’s brand-new cerulean crayon. She doesn't know what color that is, though, and she won't let him show her! Instead, she asks him yes-no questions to rule out crayons. It's like a game of 20 Questions—fun for Gabi and frustrating for César!

A playful exploration ...