S.M.
Hi, my daughter is also 4 and she has been doing the same thing since she was able to play!! Totally normal, she is collector not a hoarder!! They love things that other people don't want. When I get the mail I give the junk mail to her and she is there waiting for it. Just teach her that at some point we need to make room for more things. Get her bins, help her with storage issues, and get a trash can just for her. I was concerned too, but over thime I realized that she is just a kids who likes to collect!! Do't make her feel weird be on her side and I promise it will get better. Bandaids no big deal my daughter used to collect dirty tissues!!! I taught her that they have germs and she could get sick and now she collects only healthy things, but it did take time....Relax!!!! Good Luck!!!