My peeps weren't doing Kung Fu either. It was the only "praising" trophy I needed and I was getting frustrated. I grabbed my girl and plopped her in the backyard where they go for Kung Fu. She kept trying to wander off and do other things or go back to work, but I just kept picking her up again and dropping her until her action bar said "Doing Kung Fu". It took a few minutes, but it worked and I got the trophy. I think sometimes it's just hard to ctach the peeps in an action, this way I made sure that I caught her in the act!