I had a cool theological discussion with Gemini tonight, where we discussed a fictional return of Christ as a child. In that context there really is no way based on the bible to rule out the Lord returning as a child. For example, he could come back as a child, grow into a man, and then fulfill all the expected prophecies. Wording such as him "returning on a cloud" can easily be interpreted symbolically as him "returning in some supernatural way", not necessarily riding an actual cloud. One quirk is that everyone going to heaven will have a physical body. Perhaps the new heaven should be an actual planet (e.g., a second Garden of Eden).
1. Why not just have him grow at a fast rate as you suggest? Can you accomplish everything with that?
2. We will probably be 4D creatures. Jesus traveled through a wall in Acts. We should be able as well. We will have bodies but different than what we have now.
3. Perhaps a cloud of glory. Lots of light, flashes of lightning, etc.
