I have just moved into my new place for about a week. We have decided to stay for 4 days at our own place and 3 days back at in laws place so that its nearer for the kids to commute to the school and also still able to spend time with the grandparents. However after trying out for one week, it seems like the kids are having difficulty sleeping for the first night at each place. Is this a bad idea for 21 months old? Should I just stay at one place?