the children who you are going to look after are under six.you are going to look after the children are under six.

问题描述:

the children who you are going to look after are under six.
you are going to look after the children are under six.

不对,应该:you are going to look after the children under six.,或者you are going to look after the children who are under six.

不对,应该:you are going to look after the children under six.

第二个句子是错误的,应该是you are going to look after the children under six