I have noticed that many hotels and hospitals offer an “Employee Hall of Fame”, a wall of smiling employee faces, normally located in a corridor with high footfall. I've seen similar photo walls in office reception areas as well.
Maybe your organization has a similar scheme. After all, recognizing and acknowledging the contribution of junior staff should be a motivational thing to do, shouldn't it? As with many company schemes, the answer is both yes and no.
While it can be operated fairly, you should think really hard before replicating something like this. Why? Because any device, prize, recognition or award that creates winners also, by definition, creates many more ...