Retired Grandpa Uses Free Time To Build Backyard Roller Coasters For His 6 Grandkids

A retired aerospace engineer has spent the past two years designing and building roller coasters in his backyard for his grandchildren

What started as an attempt to make one backyard coaster for his grandchildren quickly led to the creation of three: the original coaster, a larger coaster, and a small coaster called the Little Rocket for kids as young as two. Gregg, who lives in the Seattle area, said his six grandchildren love to ride the roller coasters.

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