Getting rid of some toys to make room for new ones

Okay so my son is three and this is the first time we’re doing this that he’s actually old enough to notice me getting rid of some of his toys.

I was wondering what I could do to make him involved I don’t want to get rid of things he likes (more thank I thought he did) but he still has a hard time communicating.

**Yes I plan on donating them, we have a toy drive every year in my town before Christmas for kids that won’t be getting anything on Christmas morning.