I would say switch, I had Nintendo in the past and now have xbox. The switch has a lot more games for kids their ago and when they are older you can get them an xbox in how ever many years and the switch doesn't have very many tiles that aren't appropriate for there ago were as the xbox does. They both have mincraft and sure the xbox does have roblox but the switch had all the different Mario games. In the end the switch is more appropriate for their age but the xbox is more future proof.