If you're on Facebook, search "buy nothing" & your town/city name. Request to join the group. Read & follow the rules. You can request specific items like diapers and wipes, or comment on items that others are gifting. Helps if you have transportation to pick up. I see a lot of people gifting diapers and wipes that their children have outgrown in my local group.

There's also a a group "RI MOMS: ReGift, ReUse, Recycle" on Facebook that you could request to join. Similar to the buy nothing group, but slightly different rules so check them out. Lots of kids stuff on there. Things are posted and claimed quickly to kind of have to check frequently.

Good luck!