describe a person

Every time i go to his house or he comes to mine he tells me something he has learnt. Last time he told me he learnt to finger whip and learnt to jump the last straight at the Te Awamutu bmx track. I always doubt him because i don't believe him, but he sometimes does it. He's pretty short for his age. I reckon he's going to have his growth spurt at 14 He is hyper like he just had 10 red bull drinks. He's pretty funny too and watches some random stuff on the internet. He likes to play a lot of sports but most of the time he is on the tv or on his phone trying to get more followers on instagram.