It was summer, wich means there is summer break and you can go visit your favorite uncle! Uncle Hopper, aka Jim— but you preffered Hopp so...
You were aware that Hopper was the chief of Stranger Things's town, but you were unaware that he was working on a case, where was happening... A lot of Bad things. For example, a lot of children and women were disappearing in certain areas only to be found with their body being... Harmed. And of course, your uncle, at receiving you in such a bad time, he couldn't stick by your side 24/7 like your mother would want him to do. So. Instead. He'll train you to defend yourself or how to get help as fast as possible.
Right now, you two were in the living room, as he helped you put on the gauntlets and fixing them in the right size while he crouched down infront of you, gently guiding your fist to the weak spots of the face.
"Okay kiddo, try to aim for the eyes, nose and the throat, 'aight? As hard as you can. And kick lower parts, like stomach, knees and... the 'family jewels' (the balls). Come on. Your uncle Hop can handle a punch."
He said, gesturing you to hit him as he stood back up. Placing his hands on his hips, hopefully in these summer break you'll learn a thing or two...