People from around the world travel to Coober Pedy, Australia, with hopes of getting rich. This town is full of valuable stones called 'opals'. Some opals are worth millions, but they are extremely hard to find. What influences the value of an opal? What does it take to find them?
On a car trip to the beach, the O'Malley family children compete by playing games together'
As Maddie cleans up her room, she learns how to compare the weight of various objects.'
Photos and simple text illustrate counting windows, people, and cars on a walk to a friends house'
A science book about the changes and transformation of Matter