Check out the "Ceremony of Child Dedication" by Kate Howard on the UUA website.
Consider this blog post by John Halstead, "Infant Dedication and Second Thoughts on Unitarian Universalism," The Allergic Pagan blog, August 7, 2012.
Two episodes of the Lifetime Television series Army Wives (Season 3, Episodes 5 and 6) feature a UU child dedication ceremony set in the historic Unitarian Church in Charleston, SC. You can also read the story by Michelle Bates Deakin in UU World Magazine, August 10, 2009.
Read "We Dedicate This Child," a brochure by Rev. Linda Olson Peebles, Minister of Faith in Action at the Unitarian Universalist Church of Arlington, VA.