Tell them to bend their knees and drop their hips as they try to catch the football. This is not easy, but it is effective.
I have seen the best of hands and the worst of hands. That is how it works in football. You have kids with magnetic hands who catch everything and others who have Teflon hands where nothing sticks.
Some kids with Teflon hands run like a deer and display some swivel in their hips, but when the ball hits their hands it is a complete disaster. The ball goes everywhere but in their hands. You know you could have something special if you can get him to simply catch the football. How do you do that?
I have some coaching advice and drills that may help warm up and soften ice cold, stone hands.