May be my talking with my son today was like a conversation between a butterfly and a caterpillar. I reminded him of his promise to help me with the bookshelves, but he got angry and started shouting that he would make shelves for me, but when he had finished assembling the gimbal for the drum set. When we bought a drum set 2 days ago, he was most courteous. But, having received what he wanted, he forgot about everything. I'm waiting for the flight from the caterpillar.