It's important to remember that a radar gun is a tool and its effectiveness depends largely on how it's used. Misuse could lead to complications, especially when it comes to younger children. There's a tendency for kids, especially around the ages of 10 to 12, to push themselves too hard when they see their speed being tracked. This overexertion could potentially lead to mechanical issues or even injuries.
Many parents want to see their child continually increase speed, which, while understandable, can sometimes get in the way of proper development. Younger children, in particular, can get fixated on velocity numbers and it could start affecting their mental game. For example, with my own child who is 10, I've noticed that even just a few instances of measuring his pitch velocity can lead to him becoming overly focused on the numbers.
However, I've found a balanced approach to using the Pocket Radar, especially with the Smart Coach model. I now avoid showing my son his pitch velocity altogether. Instead, I use it as a tool for me to monitor his progress. That said, it’s a different story when it comes to measuring exit velocity (velocity off the bat), which we actively track.
Remember, it's all about balance. While I don't plan on revealing my son's pitching velocity until he's around 13 or 14, I still see value in using the radar to track his improvement. Having a tangible way to show children their progress can be encouraging. It can also help them understand that their efforts are producing results.