What's in the wardrobe?

Your mom has misteriously hidden something in the wardrobe, and won't tell you what it is. Instead, she yells at you to do your boring math homework... In this short point&click adventure, you'll have to sneak through the rooms of your house to find the key that will allow you to open that wardrobe, while avoiding getting caught by your mom!  What would be that thing that you can't know about..? …