Pokhara is one of the best cities to see in Nepal, a welled planned city with proper roads and clean environment, with some of the best scenic views all around. Traveling about 200 km from Kathmandu you can reach to this beautiful destination.
It seems there is always something to do in Kathmandu and you really seldom need a lot of money to have a great time. One tip is to check at the Tourism Board to see what’s going on. You really cannot help but see this huge building in the Ratna Park area and right next to that is a nice park, the expo center, a covered market (flea market), places to eat and a Ram Dev store. I suggest that you spend a morning in this area shortly after you arrive in-between activities.