HELP NEED ADVICE Moving DD (3months) to shared room w/DS

[Elsbells]

DD is 3 months and we are moving her to the 2nd bedroom. She will have to share with DS (he is 2 - we only have a 2 bed place). There is no room in our br for cot and DH isn't into co-sleeping.

I am concerned that he will throw things at her like toys or even more scary a blanket or something that will sit on her face.

Any tips? Someone mentioned a net to me once. If so where can I get? Any other ideas? And pls don't say move DH to sofa and DD and I could just snuggle in the main br