I have 2.5 year old twins. They went through something similar around that age as did my now 13 month old singleton. With the twins we would set up bottles before bedtime and then set them by the bed (we co-sleep), then as they woke us up wanting to eat we would hand it to them, as they started to realize that they could get it on their own they would grab the bottle and go back to sleep on their own. In terms of the talking and playing...it could be that they are waking each other up and wanting to play.
I know all of my kids start waking up off and on from about 3 am and typically want something to eat or drink. With the twins we gave them bottles for the singleton he rolls over and nurses.
I know that is not very cohesive for ideas for you, i would follow your instincts and if they are saying that the twins are wanting more food give it to them. If you feel it is a milestone that they are attempting to reach then it will probably go back to normal in a month or so or until they reach said milestone.
Good luck feel free to email me or message me personally if you want more info or another twin mom who has been there.
S.