All day long, as he maneuvers his donkey cart through streets crowded with cars and camels, down alleys filled with merchants' stalls, and past buildings a thousand years old, Ahmed keeps his secret safe inside. It is so special, so wonderful, that he can reveal it only to his family, only when he returns home, only at the end of the day.

    He just liked to collect frogs. Tyrone’s interest in science led him to Harvard University, and though he struggled at first, he found his calling in the research lab of an amphibian scientist.Meanwhile, scientists discovered that all around the globe, frogs were dying. The decline has many causes, including habitat loss and disease. Tyrone discovered that the most commonly used pesticide in the United States, atrazine, may also play a role. Tyrone tested atrazine on frogs in his lab at Berkeley. He found that the chemical caused some of the male frogs to develop into bizarre half-male, half-female frogs. What was going on? That’s what Tyrone wants to find out.

    It was written especially for children who have been convinced by the attitudes of adults that mathematics is (1) impossible (2) only for bright kids (3) no fun at all anyway. This book says that maths is nothing more than a way of looking at the world and that it can be relevant to everyday life (Street maths) and fun (How many sides does a banana have?). Hundreds of mathematical events, jokes, riddles, puzzles, investigations and experiments prove it!

    In this lively and educational reader, they'll learn how those plants grow. Kids will take this magical journey from seed pollination to plant growth, learning about what plants need to thrive and grow with the same careful text, brilliant photographs, and the fun approach National Geographic Readers are known for.

    You may find it for free on the web. Purchase of the Kindle edition includes wireless delivery.