For the past few days I've noticed that they haven't been together as much. Lately Phillip has been in his room by himself while Amy is in her room alone. They no longer stick together.
In sadness I went on a mission to find out what caused division between my brother and sister. I was eager to see what made them part in such a way. Today I believe I solved the mystery. It is very clear why they are not spending as much time together.
They now have walky talkies!