"Silly things" refers to actions, objects, or ideas that are not serious or important. They are usually amusing, foolish, or lacking logical reasoning.
Trying to do so seemed absurd, and I found myself doing silly things like going to the supermarket alone, only to leave with all the wrong items. (breastfeedingtoday-llli.org)
Doing silly things like that makes it fun for them and you usually end up getting the best shots too. (andeelayne.com)
There are a lot of silly things like in this game that you can get to change up how you play. (nintendofuse.com)