Are you ready for the difficult questions your kids will ask you about sex? The Learning about Sex series for the Christian family will boost your confidence and prepare you for the questions your children will ask as they grow in age. Each of the five books for boys in this pack covers age appropriate material. Why Boys and Girls Are Different is for ages 4 to 6. Where Do Babies Come From? is for ages 7 to 9. How You Are Changing is for ages 10 to 12. Sex & the New You is for ages 13 to 15. Love, Sex & God is for teenagers and young adults over the age of 15. Boy's Editions.