Some areas of the country do throw the weight in youth competitions. If you or one of your athletes is scheduled to throw in a youth meet, you will need to contact the meet director and check what size weight they will be using for the age group.
In the sense of performing as designed, most radar detectors do detect the presence of police radar in the immediate vicinity of a speeding vehicle. Whether or not that information will actually prevent a driver from receiving a speeding ticket remains to be seen, however.
LASER DETECTOR TESTS: WHAT YOU SHOULD KNOW. Speed laser amounts to shaft of faint light, very small in diameter, spaghetti size as it leaves the gun. A laser detector looks for that faint light. Laser enforcement is quick, and defending against a light beam is an iffy proposition.