Two Puerto Rican tree frog siblings learn about science and social studies topics during their adventures on their island home.

In this chapter book series, Rafi and his younger sister, Rosi, explore their surroundings and learn about the traditions, plants, animals, and environment of Puerto Rico. Young readers will enjoy the adventures of these curious siblings and will relate to their special bond as brother and sister. An added plus is the sprinkling of easy Spanish words that add flavor to the stories.

In Rafi and Rosi, Rafi amazes Rosi with the magic he finds everywhere. He can move sand with his magic fingers. He can shoot stars from the sky. He can even find the smallest tree in the forest. Then one day Rafi's pet hermit crab runs away. Now it's Rosi's turn to show that she knows where to look for magic too. Can she find the crab in time for them to watch it shed its shell?