☆.A.
If it is "black mold" you need a professional company to remove it from your home. Unfortunately, it will be VERY costly and it IS very dangerous.
My BFF had a tiny spot on the wall of her basement in Georgia and had to move out while the work was being done. And it was $$$$$$
Yes--especially if your furnace & some duct work are in your basement, your kids are very possibly at risk. Do NOT mess around with this...you probably shouldn't have been "shoveling out" true black mold. Call your doc asap.
That mold could have traveled up and through your walls!
Not trying to alarm you but if is IS toxic black mold, you've got potentially a lot more at stake than losing some sentimental items--your health!
You might start by calling your health department. You need a company trained in how to eradicate this. If it can be. Some homes are lost completely to black mold.
Good luck!