If not, here is something you should read. . .
If people think that 'rocket science' is something which cannot be explained to kids, read this report on how patiently Annadurai explained about the mission to school kids.
For kids here's a tip from him on how to proceed with your dreams and mission -
He told the students to take the advice from their parents and teachers seriously. He talked about how his father wanted him to study literature and named him Annadurai too, but he had stood by his choice and proved that he was successful.So, be clear in communicating your choice to your parents. If you are determined to achieve something big in the field of your choice, nobody can stop you. Your parents will help you in realising your dreams.
It is YOU who has to be determined and be clear about it.