Children’s Birthday Party Invitations. I will be the first to admit that I see nothing wrong inviting 100 of your closest friends over to celebrate your child’s birthday. Why not? We love having our friends over and a birthday is a perfect excuse to have a good time. I have always sent out “real” invitations for all of my son’s parties. I am not very good at keeping a scrapbook for him, but I do keep a birthday party invitation every year to put in his memory box. As much as I love Evite (and I do!), I love picking out birthday party invitations even more.