nimble

moving quickly and lightly; "sleek and agile as a gymnast"; "as nimble as a deer"; "nimble fingers"; "quick of foot"; "the old dog was so spry it was halfway up the stairs before we could stop it"

चिंटू ऐसा सामान्य नाम है जिसे सुनते ही चंचल, चपल, दौड़ता- भागता बचपन याद आता है !

Ravi is nimble and alert in the class.