Not a problem around here. There are tons of hand gestures constantly being used, I just don’t understand any of them.

For instance, when anybody says “The Lord be with you” everybody responds by thrusting their hands at the person. At “We lift them up to the lord” everyone sticks their hands up in the air. It starts to look a bit like a big hokey-pokey going on.

Then there is always the carrying of firewood. During the Our Father the people in the pews of course grab hands, but up in the sanctuary I always see the people carrying imaginary firewood. It is the funniest position I can imagine to take during a prayer, and seems so completely disconnected to what is actually happening. My favorite though is the ever presnt Nazi salute. Whenever anyone is baptized, confirmed or instituted in some position like that of EMHC all of the people in the pews will hold their hands up in some sort of imitation of a laying on of hands, long-distance style. However, instead of looking prayerful or some such it is a perfect reenactment of a Nazi rally and everyone is saluting Hitler. A bit creepy actually.
So, I would say that here locally there are bunches of hand gestures going on. Too bad the sign of the cross or the folded hands you mention are not among them.
I agree with you on that, and try to teach my children appropriate gestures and the like during worship. I think they mean a lot and encourage a proper attention to what is going on. I constantly remind them, my kids that is, when to hold their hands together in front of them in prayer, including the Our Father, and all the way to the Amen at the end, rather than just after the “And the power…” part. I teach them to make the sign of the cross at “Blessed is he who comes in the name of the Lord”, and to bow during the Nicene Creed. We are the only people in our Church which seem to do these things btw. Having converted about thirteen years ago from high-church Anglicanism I also teach them to bow their heads when the crucifix is carried by in the procession, though we are certainly alone in this. I believe these things all contribute to developing a mindset proper to worship and this is especially important in children.