Where can I find sex ed material for intact penises?

My church has decided to put together a week long sexual education course for teens and younger children and I've volunteered to be one of the speakers. However, I can't find much information on intact penises (nothing on American sites at least but I did have some luck looking through Australian and European websites). For example, I can't find condom or hygiene information or even a half-decent diagram regarding the topic. Anything I can find, the information is incomplete or are pro-circumcision (which obviously I'm not going to show to young children and teens). The majority of the boys in the class are not circumcised so links with circumcised penis information are virtually useless in this case. Thank you for any helpful links. I appreciate your help.