1) why do we add salt to the ice?
ans: So the ice doesn't into water
2) why do we add the cookies and other things, only after the milk has frozen slightly
ans: to make cookies and other things freeze with milk easily
3) what are two factors that affect the freezing you think?
ans: salt shaking
4) why do you need a bit of air in the bag?
ans: to make milk turn frozen and move around easily