Boy helps his dad build rollercoaster in back garden

7 May 2014 Last updated at 15:16 BST

A boy has helped his dad build a rollercoaster in his back garden. 10-year-old Lyle Pemble from America wants to build rides when he grow up.
Back yard rollercoaster
This rollercoaster is in 10-year-old Lyle Pemble's backyard. He helped his dad design and build it.
Back yard rollercoaster
The coaster is powered only by the force of gravity and is made of wood.
Back yard rollercoaster
Lyle wants to work as a rollercoaster engineer when he grows up. The ride is nearly 200 feet long and took about six weeks to build.
Back yard rollercoaster
Lyle's dad, Will, has made sure the ride is safe, it's called "The Caution Zone" because of all the safety features they've used. Definitely not one to try at home.