If you mean your chicks are in a brooder - you can keep them inside by putting a wire top on the brooder. It will allow good air exchange and keep them where they belong.
Thank you. I heard that they probably won't get out of the bin, but I feel like they've already became airborne enough at 2 weeks old, I hate to think what they'll do in a couple more weeks.
Hi and welcome to BYC. As a general rule, whatever you hope your chickens won't do, they will. Better to prepare for all eventualities IMO.
You'll find lots of info in the Learning Centre - https://www.backyardchickens.com/atype/1/Learning_Center and if you have a specific topic in mind, just type it in the search box - there's a wealth of information on past and present threads.