My 6yo DC got loads of presents at xmas. Some were very similar to existing stuff eg remote control car where he has 2 already.
As he barely registered them on xmas day I put them in a bag and put it to the side. He clearly has favourite toys that hes been engrossed in.
I'm tempted to keep aside, see if he mentions them, and if not donate the new unnoticed things to a food bank or similar.
We don't have the space for all this stuff. If I asked him he wouldn't want to part with anything.
But is this a shitty thing to do?