Okay kiddo, so do you know what a bike is? It's something you ride that has wheels and pedals. Well, people who ride bikes really like to play on something called a pumptrack. A pumptrack is like a rollercoaster for bikes - it's a special kind of track that has lots of little bumps and curves that you can ride over and around.
The Philly Pumptrack is a pumptrack that is located in Philadelphia, which is a big city in the USA. It's a really cool place where people can go to have fun and practice their bike skills. It was created by a group of people who wanted to make a fun place for people to ride bikes.
The pumptrack in Philly is made out of something called dirt. It's not like the dirt you find in the garden - it's a special kind of dirt that is packed down really hard so that it's like riding on a hard surface. The dirt is shaped to make all the little bumps and curves that make the track so fun to ride on.
When you ride your bike on the Philly Pumptrack, you don't have to pedal all the time. Instead, you can use your body to "pump" your bike up and down over the little bumps. It's a bit like bouncing on a trampoline, but on a bike! This helps you go faster and keep going around the track.
Lots of people love to ride on the Philly Pumptrack - from little kids on their first bikes to adults who love to do tricks and stunts. It's a great place to have fun and learn new bike skills. And best of all, it's free and open to everyone!