How many feathers does a bird have? is the 1st book in the I Want to Know About series.
How do fish breathe underwater? is the 2nd book in the I Want to Know About series.
How do people climb mountains? is the 10th book in the I Want to Know About series.
How do divers keep warm? is the 11th book in the I Want to Know About series.
Which reptile has a frightful frill? is the 12th book in the I Want to Know About series.
Which dinosaur had a sting in its tail? is the 13th book in the I Want to Know About series.
How do people live in the desert? is the 14th book in the I Want to Know About series.
How are bridges built? is the 15th book in the I Want to Know About series.
Which is the biggest animal baby in the world? is the 3rd book in the I Want to Know About series.
What’s the time on Earth? is the 4th book in the I Want to Know About series.
How were the first cars like? is the 5th book in the I Want to Know About series.
Which is the hottest planet? is the 6th book in the I Want to Know About series.