Blimplane

I have been toying around with the idea for an extremely slow aircraft for small rooms that:
A small child could fly (Ling?);
Has normal r.c. aircraft principles.

Most available designs tend to fly at about a fast walking pace which is too fast for flying up the stairs and in small rooms.

To slow down the flight, I think the body and wings should be inflated and lighter than air, but the total aircraft should be slightly heavier than air. Then a slow forwards movement would be enough to produce lift.

Finally, I suppose the design is similar to having a streamlined blimp with wings.