00458nam a22000977a 4500020001800000100001800018245003500036260003700071490002600108650022600134  a97807586140941 aGreene, Carol00aWhy Boys & Girls Are Different  bConcordia Publishing Housec19820 aLearning About Sex #1 4aThis book opens the door to discussion with your preschooler, providing the proper amount of information for this special level of development.  Explores similarities among children, which leads easily to the differences.