Yes you can. Smart Sock 3 and Cam 2 work perfectly for twins or siblings. Each baby needs their own sock as well as the associated base station and camera. Then you insert each device into the Owlet app to be able to read the children's values in the same app. Unfortunately, it is not possible to stream from multiple connected cameras at the same time, but you need to switch between the different cameras in the app to see the different feeds.