S.W.
If they are for participation only. I would keep them for about a year and then toss them.
The only trophies I have are the ones that my son earned for playing football in high school not just showing up. The whole team got reamed once for how they lost a game and had to stay home over a holiday weekend and practice. I could not get my son out of the practice and had to forfeit a ticket to Paris because of it. We went he stayed and practiced.
I find it a bit much to give kids a trophy just because you came to the team. Now if you really worked and were a player that is different.
My next trip to my son's house, I will give him a small tub of his trophies so that they are out of my house along with some other things that he will appreciate now that he is older and possibly his old toy box with the toys. Yes, I am downsizing and need these to go after 40 some years.
the other S.