Answer:
I fill a room but take no space.
Take off my skin I won't cry but you will.
I am black within and red without With four corners round about.
When I point up itβs bright. When I point down itβs dark.
I have keys but no locks. I have space but no room. You can enter but canβt go outside. What am I?
Whoever made me don't want me. Whoever bought me don't need me. Whoever use me don't know me.