ScienceWiz / Energy Experiment Kit
Energy (Blastoff! Readers: First Science) (Blastoff Readers. Level 4)
Move It!: Motion, Forces and You (Primary Physical Science)
Energy Makes Things Happen (Rise and Shine) (Let's-Read-and-Find-Out Science 2)
Melissa & Doug Wooden Building Blocks Set (Developmental Toy, 100 Blocks in 4 Colors and 9 Shapes, Great Gift for Girls and Boys - Best for 3, 4, 5, 6, 7, and 8 Year Olds)
Energy Is Everywhere (Rookie Read-About Science: Physical Science: Previous Editions)