Yeah, my son used a Beretta A303 Youth 20 gauge. I've got a MEC 600 Jr. set up for the 20, and a MEC 9000 (I think) set up for my 12 gauge.

I actually started shooting trap when I was about 13 (around 1970) using a Winchester 370 Jr., 20 gauge. Sweet little single shot that I bought with money earned mowing yards and babysitting. I think Trap is bigger up north (I grew up in Illinois), whereas Skeet is bigger here in the South.