Provides an introduction to the science of measurements and the instruments used to measure such things as size, weight, volume, distance, and temperature; and includes fun facts and a glossary.
Presents an examination of the ancient Maya civilization, showing where it was located, and discussing Mayan family and community, religious beliefs and practices, kings and kingdoms, military might, economy, and culture.
Jon and Tania go to a costume party at a museum full of ancient weapons and armor, and when they discover a ghost lurking among the relics, they try to help him with his mission so that he does not become a danger to everybody.
When a Mayan girl in ninth-century Guatemala suspects that the High Priest sacrifices anyone who stands in the way of his power, she proves herself a hero.
Jon and Tania--who can see and communicate with ghosts--journey down the Mississippi River on an antique riverboat in search of ghosts, but the spirit of a pyromaniac, riverboat captain proves dangerous to the siblings and the crew.
Thirteen-year-old Jon and his eleven-year-old sister Tania accompany their parents, who host a popular ghost hunting television series, to a spooky old hotel, where Tania's special ability to communicate with ghosts comes to light.
