Abacus

Twelve-year-old AP is crazy about science but Kate, his older sister, has no time for him or his geeky experiments. All that changes when a curious abacus transports them back to Arthurian England. There, AP uses his knowledge to help them out of trouble. On a second adventure, they join the Sioux in Montana and witness Custers defeat at the Battle of the Little Bighorn. Then, in ancient Egypt, AP uses science again, allowing Kate mistaken for a priestess-to perform `magic that amazes even the Pharaoh.

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App Name:Abacus 本 ebook 书

App Version:1.0.0

App Size:1587 KB

Cost:US$9.99 USD