Well done for getting out of an abusive relationship and getting permanent safety. That is a great achievement.
I would never say anything nasty to you, I know first hand how hard it is to get out of an abusive relationship. But a lot of people don't know that, and they might just see a woman who got permanent safe housing. You deserve it and your children deserve it. But my advice to you would be to focus on privately feeling relieved and proud that you have that for your kids.
Think very carefully about the things you need / want.
I'm not like Oprah telling octomom to go and pray here! I hope you can tell that. I divided things in to two lists. What do I need (safety, security, groceries, to pay the bills) what do I want. Try to ''let go'' on the want list. Toys, well, they're nice but kids can play with boxes, crayons, clay..
By appealing for toys on facebook so publicly some people (not all) may feel that you are ''lucky'' to have your council housing for all six of you and now here you are looking for toys. They don't understand that you still have to pay for the housing. They may see you as entitled. Which is not where you're coming from but other people may see it that way.
I would look in charity shops and get bargains that way. Don't let everybody know what you have, don't have, would like to have, are ASKING other people to donate. Keep it private.
Good luck in your safe secure home. You have given your children something more valuable than toys.
Once upon a time, the notion that all children had a pile of toys was not there. An empty box, a box of chalk, a yoyo, you can keep it old fashioned.