2 year old is now putting EVERYTHING in her mouth!

It's driving me nuts! She never used to do this but now all of a sudden everything is going in the mouth! Toys, stickers, etc. I cannot stand it and I dont know what to do. Everytime I look at her she has something in her mouth.

I have tried everything. Talking to her, taking her toys away, etc. I dont think it is teething, as she seems to think it's funny and intentionally looks at me when she is doing it and starts laughing.

We are also going through terrible 2s. She is no longer the only child also because I now have a 3 week old son.

Is she just acting out? How do I get her to stop doing this? Any advice will help! 🧡