I really love skateboarding but ive recently broke my board, Do you skate? 
I do!  I've been skateboarding for years - I love riding and performing tricks!
Thats pretty sick. Im pretty curious about the history of skateboarding for my class project, Do you know when they were invented? 
It's not clear exactly when they were invented, but it was sometime in the 1940s or 50s. Initially skateboards were made of  wooden boxes and roller skate wheels!
Oh ok I figured they have been around for a while. Are the wheels on a skateboard made of rubber or plastic?
Skateboarding
Skateboarding is an action sport which involves riding and performing tricks using a skateboard, as well as a recreational activity, an art form, an entertainment industry job, and a method of transportation. Skateboarding has been shaped and influenced by many skateboarders throughout the years. A 2009 report found that the skateboarding market is worth an estimated $4.8 billion in annual revenue with 11.08 million active skateboarders in the world. In 2016, it was announced that skateboarding will be represented at the 2020 Summer Olympics in Tokyo.
Since
at their skateboarding diligently. Muska explained, "I'd just watch what he was doing ... he's talking and they're listening to him, you know? So I think Jamie really opened my eyes more that you could do more than just skate and get more involved with these companies, you know?"
The top five skateboarding influences, as identified by Muska in 2012, are Christian Hosoi, Natas Kaupas, Mark Gonzales, Pat Duffy, and Nyjah Huston—during the same interview, Muska admitted that "