I have a 3 year old sister.. Who will prob get into my room and maybe in my hedgies cage... when i get one.Don't get me wrong she is smart and all but she doesn't listen.....And i have no idea where to put the cage or what i should do.. I am going to use a plasic tub.. Should i put a top on it or should i get a cage?? I may even make a C&C Cage..I also have a 6 year old brother but he will listen.. I need help. Before I do anything....