Kids seeing nasty ex

[pollylush]

I wonder if anybody could be of help. My ex of 5yrs is perfectly described as a psychic vampire (of which i am sure he is unaware),even so i protect myself and all that! However he is a delibrately malicious and vindictive person,hates the fact i left him even though he didn't want me and the children. The children have to see him (through a court order), even thogh frequently they express they don't want to. Both have a fear of their dad, though he has never stuck any of us, he is aggressive. My children now come home really aggresive and because they are both sesitive i think they are consuming his negative energy. So i was wondering what protection i could send them with or what would be good for them? Looking forward to some insight. xxx