"Pressing Down explores the benefits and uses of the lever. RobbO and RobbEE learn how a lever can be formed in three different ways to do different kinds of work--lift and lower, separate, and open."
"Leo teaches his cat Pallas all about spheres by applying his knowledge of geometry to their Stone Age world. Entertaining illustrations and stories provide a fun introduction to math concepts, includ
'Leo teaches his cat Pallas all about squares by applying his knowledge of geometry to their Stone Age world. Funny illustrations and stories provide a humorous introduction to math concepts, explaini
"Leo teaches his cat Pallas all about triangles by applying his knowledge of geometry to their Stone Age world. Entertaining illustrations and stories provide a fun introduction to math concepts, expl
"Leo teaches his cat Pallas all about lines by applying his knowledge of geometry to their Stone Age world. Funny illustrations and stories provide a humorous introduction to math concepts. Leo explai
"Will Joe be able to survive in the hot, scorching desert? In this exciting survival story, readers journey along with Joe as he searches for water and runs into a desert tribe."--
"Separated from his science team on a mountain after a landslide, Joe is in no hurry to get back. The slide has carried a wealth of fossils with it for him to study! Joe examines these and the mountai
"When separated from his fellow scientists on the ice in the Arctic, Joe must learn how to survive in the harsh climate. Joe builds an igloo, goes ice fishing, and makes a few animal friends in this e
"Alone in the rainforest, Joe is suddenly caught in a tropical storm. He uses his science skills to observe the habitat around him to build shelter, find food, and search for help."--
"After a freak wave maroons Joe on a deserted island, he investigates the food chain of the island's ecosystem. He learns to gather food and build shelter, copying other living things and using whatev
"Adrift in heavy seas after a hurricane, Joe finds his boat pulled by strong currents and winds. He follows a flock of birds and discovers other sea creatures moving in the same direction toward some
