a boy standing on a skateboard 
a man standing behind a boy 
a man and a boy on a sidewalk
A man wearing sandals
A man wearing glasses
A man wearing a white shirt
A man wearing green/grey shorts
A boy riding a skateboard
A boy wearing black knee pads
A boy wearing a pink helmet
A boy wearing black arm pads
A boy wearing green shoes
a boy learning how to skateboard
a fence is behind the man and child
the concrete is smooth
the kid is on skateboard
a metal fence 
a little boy with a helmet on riding a skateboard next to a man helping a father ride a skateboard