A little boy skateboarder is doing a trick on his board while another young skateboarder watches .
We doubt that a boy is doing tricks on a skateboard , to show the other kids how to do it .
We doubt that a boy is doing tricks on a skateboard , to show the other kids how to do it .
It is almost certain that a boy is doing tricks on a skateboard , to show the other kids how to do it .
A boy is doing tricks on a skateboard , to show the other kids how to do it .