Turns out they really do grow up so quickly, at least in the NBA.
Yesterday's rising stars can swiftly become so passé. A couple of heartbeats ago, the Oklahoma City Thunder were exciting new kids on the block.
Now they are real danger of being pushed aside by Memphis Grizzlies. The San Antonio Spurs were the pick to emerge from the West to challenge Miami Heat, but are being pushed around by the kids known as Golden State Warriors.
This new wave of talent does not end in the West.
The Indiana Pacers, without a true star, are having their way with New York Knicks.
These new challengers are being led by a bevy of fresh talent.
The Warriors' Stephen Curry has been the most exciting player in the play-offs, averaging 25 points and 8.3 assists per game.
He is not doing it by himself. Playing with a sore ankle in Golden State's 97-87 overtime victory against the Spurs on Sunday, he had plenty of help. Jarrett Jack, Klay Thompson and Harrison Barnes all stepped up.
In the Pacers' 82-71 victory over the Knicks on Saturday, it was not Paul George and David West leading the way, but centre Roy Hibbert (24 points, 12 rebounds).
And the Grizzlies could knock the Thunder - who are missing Russell Westbrook - out in the second round.
Their confidence swelled after beating Los Angeles Clippers in the first round, which made the Clippers just another team once on the rise.
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