Sophomore Keira Chang, who appeared on KTVU FOX 2 in November for releasing a bestselling book, “How Do Rainbows Work?” has just published her newest work for children, “How Do Ouchies Heal?”

“It’s a story that teaches young children about the wondrous biology of what happens when someone gets an ouchie!” Chang said. “They’ll learn about platelets and how they form blood clots, white blood cells and how they fight off invading bacteria, the way collagen supports growing tissue to replace the damaged skin and more.”

The book is Chang’s latest effort in her ongoing mission to spark an interest in STEM among young girls. “I’ve tried to outdo my first book in every way, and I hope everyone loves my newest story,” she said.