First,
Fitness Squad. It's almost exactly the same as a similar game that came out a few months ago - only the background art has changed.
Easy 3k np a day with a bit of pratice.
Cookie Crisp Ski Jump is also new.
It's not hard, not easy - just there. It should get you about 1k per day, if not more, with a wee bit o' practice.
Foster's: Revealing Video is another one of them thar guessin' games. Mmmhmm. 900np per day max.
Power Rangers: Street Battler is not a particularly fun game. This is also based on an old-school platform from a few games last year. Not really that interesting - I'm not sure how much you can make from it, because I just didn't care enough to keep playing.
Trollz Matching is the trivia-card style of matching game, in which you match trivia cards to names, words, or phrases on the screen. Nothing groundbreaking here, but it does pay. I got about 2400 np from this game, I think those who know the characters better could make closer to 3k daily.