Get back to nature at the Denver Botanic Gardens, with its special interactive areas for families. Along the Children’s Secret Path, kids are encouraged to smell fragrant herbs and touch smooth flowers. The vegetation along Birds and Bees Walk attracts bees, butterflies and hummingbird, and illustrates pollination at work. Pick up a free Family Guide at the information desk to learn more about the attractions just for kids, such as the musical instruments made out of plants. Open year round. Cost: $10.50, adults; $6, ages 4 to 15; free for ages 3 and under.