Kids will explore one of Earth's important energy resources with Biofuel Energy Projects. They'll read about the history of biofuel, where it comes from, and how we use it. They'll make candles out of butter, create ethanol from different types of sugar, and more. Projects include color photos and easy‑to‑follow instructions. Aligned to Common Core Standards and correlated to state standards. Applied to STEM Concepts of Learning Principles. Super Sandcastle is an imprint of Abdo Publishing, a division of ABDO.