SKB is a good option. Also a Ruger Red Label in 20 ga. If looking for a auto a Standard Weight 20 ga which is built on a 12 ga frame works well. Put a over length plug into it so it holds only one-off shell in the magazine. Two total. In fact I started my son out with a 1100 loading only one shell with none in the magazine. I would be more inclined to go with a 12 ga and reload shells for a boy from 7/8 to 1 1/8 ounce in a semi. Recoil is a real problem in light guns. And never give a kid a 20 ga then drop a couple of 3" shells in it. Those kick like a mule in a 20, kind of kill on both ends.