Kowloon Park - This green spot amidst the hustle and bustle of Tsim Sha Tsui is a welcome oasis, but don't miss the Hong Kong Museum of History. At this museum, kids can see how the people lived in Hong Kong over the centuries, including re-creations of a traditional Chinese medicine shop, a tea house and opium den.
Ride the double decker buses - One way to get above the immensely crowded shopping streets in Kowloon is to ride around on the double decker buses.
Open air markets - Mong Kok in the northern section of Kowloon has wonderful open air markets. The Bird Market has hundreds of song birds in beautifully carved bamboo cages. The Flower Market (Flower Market Road) is filled with not just cut flowers, but miniature bonsai and trees in pots. The Gold fish Market (Tung Choi Street) is awash in all kinds of fish.
Lei Cheng Uk Han Tomb Museum (Sham Shui Po) - This small museum is built on the site of Han Tomb. The tomb, built nearly 2,000 years ago, has four rooms, and was filled with things that the deceased would use in the afterlife, clay pots and pans, model houses etc.
Hiking - Lion Rock Country Park and Kam Shan Country Park in the northern section of Kowloon has acres of open land. Take the nature trails and tree walks to learn more about the natural history and geography. Trails for family walks are marked within the parks. In Kam Shan Country Park, kids can see hordes of macaque monkeys (don't feed them or get too close to them, they can bite.) These parks are all accessible by bus from Kowloon.
Kowloon Walled City Park (Kowloon City) - If you like crumbly ruins, visit the remains of a 19th century military outpost. Remains of the gates to the city are well-preserved, and the office of the Assistant Magistrate of Kowloon has been fully restored.