Um, there isnt a kit that I know of, but I have a 9" wingspan scratch-built extra 300, that you could hover in your bedroom theoretically....haven't flown it yet, because I am still saving up for the micro joule kit. Total weight of the whole plane with battery and servos is 3.56oz...Its been sitting on my shelf, just waiting for the avionics.

Setup so far will include the following;

Cirrus Micro Joule Kit - $129 bucks - 10grams
extra Micro Joule Servo(for ailerons) - $50 bucks - 3 grams
7.4v 2cell 340mah LiPo - $24 bucks - 30 grams
Depron Foam - about 36 grams
GWS RXC Light Power System (GW/LPS-RXC-C) - $14 bucks - 22 grams
Total weight - 3.56 oz
with 4.8 oz of thrust .

The only problem with this, is its going to be swinging a 10.4 prop which is longer than the wing....which means its going to torque roll like ...well you know.

Im hoping that by some odd chance someone will come out with a micro brushess motor that turns a 4" prop producing 4.5 oz of thrust, and weighs about 1oz......HAHAHAHAHA

If anyone knows of such a motor, please let me know....