Rosi CoquÍ's brother, Rafi, finds magic–and mischief–in everything, from the magnetic sand he does tricks with to a bay filled with algae that look like glittering stars. Then one day Rafi's pet hermit crab runs away. Now it's Rosi's turn to show her brother that she knows where to look for magic, too. Can she find the crab in time for them to watch it shed its shell?

This joyful tale of two curious young Puerto Rican tree frogs is charmingly illustrated in brilliant color by acclaimed author and artist Lulu Delacre. Young readers will especially enjoy sounding out a sprinkling of easy Spanish words that add flavor to the story. The book includes a glossary, and fun facts explain how science can be magical.