They might play up because they had bad experiences or have learning disabilities etc. If you believe in them however and give them an encouraging environment they will amaze you. Their honesty and directness and their unbundled energy, creativity and imagination is a pleasure.
The kid and dad in the video underneath is a great example of a kid living his dreams and I just love it.
If only we all could live our dreams. To live our dreams I think we should first dare to dream. Don't think of anything being impossible, just enjoy dreaming away and let your inner child do the work. Remember the last time you were excited and forgot about your worries. What were you doing. When was it when you completely lost yourself, because you were engaged in something you liked doing.
Next do it. Like the child in the video, just start with what you have. Do it on a small scale in the time you have. As long as you love it than it will grow. Do you enjoy building something or writing a story? Keep on doing it, you will grow and become better at it. Get inspired and eventually others will be inspired but even when you just get to do what you love than it doesn't matter in what stage you are or how you do it.
I am lucky to work on a dream. We started a Free club where kids can develop creativity and computer skills. It is growing slowly but it is a delight to see the kids enjoying themselves. We are learning alongside the kids and it is so much fun. It will take time but the following quote says: "Never give up on a dream just because of the time it will take to accomplish it. The time will pass anyway" Earl Nightingale