Calif. kid builds roller coaster in back yard

LOUISVILLE, Ky. (WDRB) -- A kid loves roller coasters so much that he decided to make his own, turning his back yard into an attraction.

The son became fascinated with roller coasters after a trip to a theme park, so he asked his dad if they could build their own.

Dad helped with the math and science behind it, but they may be ready to do even more.

Lyle wants to put in a loop so he can go upside down and wants to make it even taller.

The boy says he hopes to fulfill his dream of being a roller coaster designer.

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