"How do you keep a door from closing? Try using a wedge! Wedges are one of the six simple machines that help make work easier by using mechanical advantage. In Wedges Make a Point: Simple Machines for Kids, readers ages 5 to 8 learn how a wedge's shape makes it perfect at stopping something heavy from moving, and separating material to split something--like banana bread--apart. Glossary, photos, and a hands-on activity make this book fundamental for...

Triceratops weighed around 5 tons (4.5 mt) -- that's as heavy as a truck! -- and readers learn that and a ton more about the substantial creature in this volume! The Triceratops was discovered in 1887, and its head is still one of the largest of any animal discovered. Fun facts ranging from where the dinosaur ranks on a scary scale to a vital statistics guide allow readers to read about the interesting ways the Triceratops lived during its time alongside...