Is it hard? Do we stretch? Will I get toned? Is it a work out, meditation, is it easy? Do we move a lot?
I answered their questions and ended with this story.
At one of my part-time jobs one of the girls asked me, "Are you good at Yoga?" She said it with complete sincerity.
It's not about being "good" at Yoga. It's about just doing it. Think about Yoga like gardening. You don't have to be good at gardening; you just have to garden. It's the process - weeding, cultivating the soil, planting seeds...
Hopefully with the right amount of water, sun, etc. things will start to grow. Just because things don't spring up out of the ground immediately, doesn't mean you stop gardening. Just slow down, be patient, and just enjoy the process.