Old android watch to my son... (de)config tips, disconnect from my phone?

I sold my old LG square G Watch to my son a while back (at discounted price because he wanted to blow his savings on a brand new one); also I was hoping to get a new round watch. I turned off some notifications in the Android Wear settings so he couldn't mess with my phone or see certain notifications like texts from my wife. He has on several occasions messed with my phone by changing navigation while we are driving or skipping music.....

So now I just got the Urbane for my birthday :) How can I get these notifications back for me on Urbane but prevent them from showing on his G Watch (in the android wear app, these "general" settings apply to all watches)? Should I just disconnect his watch from my phone? I put some games and music on his, would he lose those? Also have watchmaker on his and send him a new watchfaces now and then. Would the existing stuff on his watch keep working?

He has an ipad, would there be any reason/advantage to connect his G watch to ipad instead?

Thanks!


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