Now Cindy's a professional

, and I'm far from it--but here's some advice from someone who got a crash course in parenting with zero outside support.
Sometimes kids just aren't big nappers or their personality is such that they don't want to nap when you say nap. My girls now at almost 2 and 3, and probably for the last 6 months dont have naptime. We have quiet-time. They both have to go into their room, sit in their beds with a book, a toy and quietly play. (This would work WAY better with 1 kid!) Sometimes, I'll stick Emma in my bed with a movie as a reward. Nine times out of ten, they'll sit and play for like 20 minutes and I'll go back down and check on them and they're out cold. Whenever I said--take a nap, they fought me on it. This way, they are playing, but quietly.
Also, and I've done this since birth. I keep a CD playing in their room while they sleep. It's on very low, you barely notice it, but it's enough to keep them entertained when they wake up or are falling asleep and also enough noise to prevent them from hearing every little sound.