My grandpa stayed sharp, social, and full of purpose into his 90s. His secrets to success are simple.

Tech Insider : Business, Technology, Travel
Author Allie Hubers posing with her grandfather
My 90-year-old grandpa worked a part-time job for 30 years after he retired. He said it helped him stay healthy, among other perks.

Allie Hubers

I lived in a camper van outside my grandfather's home to help him feel less lonely. The move also helped me grow.

Tech Insider : Business
Kate Benson in her camper and the exterior of the camper
The author lived in a camper van in her grandfather's yard.

Courtesy of Kate Benson

I still work, but I watch my grandson once a week to help my daughter save on childcare. It's been beneficial for all of us.

Tech Insider : Business
Steve smiles while holding his young grandson.
I help my daughter by watching my grandson once a week.

Steve McCarthy

Bill Gates says becoming a grandfather 'does definitely mellow you a bit'

Tech Insider
Bill Gates Jennifer Gates
Bill Gates with daughter Jennifer Gates Nassar.

Shutterstock Rex for EEM

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