Matilda's room references

I imagine that Matilda's room hasn't been touched by her parents since she was a baby except to throw in her older brother's old bed once  he grew out of it. Because of this I think Matilda gets to make it her own happy space, where she can escape from the family who doesn't support her and read, learn and play within her imagination. I picture it as basically being a pillow fort of whatever she cobbled together from the house, some old Christmas lights strung up under a blanket on her bed that she can use to read by.