"When I feel it...I say, 'To hell with the canes!'" Meet Saul, a 92-year-old man who moves to the beat in the streets of Mexico City. #GrandparentsDay

At 90-years-old, Johanna is an inspiring German gymnast who won't stop moving-and she wants others to do the same.

"I feel older-I never feel old. There's a difference." Meet Louis Gomez, a 78-year-old kiteboarder who flies high above the water.

"You're capable of doing whatever you want to do if you believe enough." For this 81-year-old swing dancing grandma, age is just a number.