how do I bring photo,s up sent with E-Mails?

From time to time my kids & gran kids send me photo,s along with their E-Mails I can read the text but cannot see Or open photo,s on screen I Wish to print them off so Nanna can frame them, I have no trouble printing or down loading photo,s from a memory card or camera with PC or PRINTER any Idea,s how to open those Pic,s sent by E-Mail ?????