Namaste dolly (i presume it's ur real name!)
I really appreciate your urge to do the good by conducting Baal/Yuva Sanskar Kendra! My accolades and best wishes to you...
1. You can ask all naamdharak from adjacent shakhas to send their children.
2. You can also arrange an opening ceremony to start with and to attract more and more people. (like arranging a prabodhan, career guidance melawa, etc.)
3. Word of mouth gains the best publicity! Go on increasing the credibility and innovativeness of your kendra to attract Yuvas/children.
4. Using games, group discussions, on the spot drama, debate, et al. (excerpt from Orkut JVM comm.)
5. Gain more & more punya and knowledge of JV!
Maybe others would be able to guide you better...
My sincere wishes for your efforts!

Viththal Viththal!!