This mod adds 1/200,000 scale models of all the celestial bodies in the Kerbol system (save for Kerbol itself) that you can push and throw around. The Mun is no larger than an FL-800 fuel tank.
More info at http://forum.kerbalspaceprogram.com/threads/134904-The-Mun-(Pocket-Edition)
https://www.youtube.com/watch?v=gUuhSO7Z9r8&lc=z13ldb3j1pypzl4uv233zfjgjym5cpfe0