Rules:
your craft must land and then return from any celestial body using only nuclear engines (mono prop may be used for docking only) - no exploits
here's my entry to Laythe
and here an old video of mine of just getting into orbit using NE's https://www.youtube.com/watch?v=Rtu7xsMREro
( its a pretty bad design , but it works, i have 7.2km/s left but i didnt have time to make a video actually going anywhere with it)