What most naturally follows?

How to make sleepover e invites
Have an email address-make an email address if you don't already have one.
Go to yahoo or hotmail or gmail or something like that. These websites make it easy for someone who is doing their first email address, and they have a very simple set up.
Have your friends email addresses-ask your friends what their email addresses are, and write them down. Send an e-card-there are basically two ways to go by sending your invitation.