Abrasives

I am glad that hubby told me that we are going to a hardware store soon. I want him to buy me a plexiglass that i have been anxiously wanting to own for my photography accessories. He mainly wants to go to the store so he can buy a couple of abrasives which i don't really exactly know what it is for. I also told him that we need a special locks for our doors so we can safely lock it without worrying that our little one might sneak out without us knowing it since our front street is highway. It's not safe for the kids i know that is why we need to be more extra careful.