2,000 years ago in China, a curious boy named Cao Chong solves the problem of how to weigh an elephant when the prime minister's most trusted and knowledgeable advisors are stumped. Includes activities.
When a dragon threatens to disrupt the life of the townspeople, a little girl challenges the scaly creature to a math contest involving knowledge of weight.
Before he can go fishing, a boy has to figure out how to get himself, his dog and all his gear out to an island in a boat that can only carry 100 pounds.