Minnie had inherited what neither of her parents were keen on. She was nutty about potions. She wasn't awaiting a wand, couldn't give a hoot about Quidditch but give her a couple of vials with food colouring in them and she was in heaven. When she'd told Sirius she'd made a shrinking solution he hadn't paid much attention. That was until everything started to suddenly disappear from the house. At first he believed James was playing an intricate joke, until he went into her playroom and saw the entire potions cupboard emptied onto the ground.
"Lets not tell mammy."