D.T.
There is a national organization of twins. Here is the link http://www.nomotc.org/ You will be able to find a local group that you can go to their meeings and they discuss everything from toddler years through what to do about school. Being a mom of two sets of multiples I recommend sperating them in school. I did with both sets and it was the best thing I coud have done. For invitation I recommend My little duckling she does great invitations here is her link. http://www.mylittleduckling.com/