If someone is sprightly, they are full of energy and are moving quickly in a lively way.
Being sprightly is a good thing. It makes people think of happiness and fun.
Examples:
The old dog is still sprightly and loves to run.
She dances in a sprightly way.
The sprightly squirrel quickly climbed the tree.
The sprightly kitten chased its tail around the room.
The sprightly rabbit hopped around the garden with joy.
Grandpa is still sprightly and can run faster than me!