I live at home, but I don't really feel the need to "hide" them.
I have most of them in the EF tote in my closet. I keep packaging in a cardboard box in another closet.
I keep my MiMi box and Leaf bag on my bed, though (I'm one of those people who thinks a bed is a desk - so I just keep stuff in a corner on my bed), out in the open. Ella is in the ditch beside my bed (um, this is also a totally legit storage space I use) along with two lubes.
Meh. I'm of adult age and it's not like I've brought something illegal into the house so I don't really bother to "hide" it. It's not IN YOUR FACE DICKS ALL OVER, but I'm sure my mom knows. *shrug*
To "hide" them, big superstores have a lot of nice big plastic tubs and some pretty cardboard ones. I make bug houses out of them, but I could probably fit most of my toys, if not all, in the 5 gallon one I have - and it doesn't take up a lot of room.