Inter lifetime is a long and wonderful phase of experience at the human species consciousness pool, which to us looks like a huge city constructed with light.
The humans in inter lifetime can mentally reach out from their own thought projection to socialize, experience anything they wish, and draw on the information available here. They simply change their mental focus with intent to explore, experience or study a topic similar to the way we use the internet here to access information, meet and socialize with people, and create virtual alternative lives without leaving our home.
All humans come through this level of experience before physical life. This was where we planned potential experiences that we are learning from in this lifetime on earth.