The third guide in the Growing Up series -- version B, for parents of boys and children with penises aged 9-14. Covers why preparing children before puberty starts makes a significant difference, all eight physical changes with timing (testicular growth, body hair, voice change, growth spurt, wet dreams, erections, skin changes), a puberty timeline, how to have the conversation at ages 6-9 and 9-12 with word-for-word scripts including the wet dreams forewarning, and how to answer the four questions children most commonly ask. Includes a note on inclusive language and support for trans and non-binary children.