My friends kid knocked his two front teeth out when he was two. He had to wait until he was 6 or 7 to have the adult teeth come through but lucky they were fine.
Is your 4 year old the youngest or 2nd youngest?
We got our blood tests today, 3 vials for DH and 9 for me! She actually forgot one of mine and only realised when she saw DH's request form as it was one of the genetic tests we are both getting.