Create a Whimsical Line Art Logo for a Children's Bookstore

Generate a playful line art logo that captures the imagination and joy of reading for children. The design should include whimsical elements such as an open book with fluttering pages, and small, cheerful characters like animals and stars created from smooth, flowing lines. The overall shape of the logo should be circular, evoking a sense of community. Use bright and vibrant pastel colors to attract children’s attention and spark curiosity. The playful font for the brand name should be incorporated seamlessly into the design. The brand name is: 'Imagination Haven'.