Another thought for you hopeful - this is easy enough for your youngest DD to use to get an idea of what meditation is all about too. (I know we've talked about it possibly being a tool that can help with her anxieties)
These run approx. 20 mins - it's a 2-3 min intro from Oprah, a 4-6 min intro from Deepak Chopra & then about 10 mins of actual meditation..... so there's no trying to sit still & mindfully for lengthy periods. It's part of why I think this makes a great beginner's tool when learning to meditate. (also because he uses mantras and gives wonderful explanations behind each day's focus)