How do I teach my child responsibilty and to clean up after herself?

Option 1)Make a mess. Then force him/her to live with the mess. They *should* eventually push their mess to one side to make space for themselves. Thats when you introduce boxes. Show them where to put their toys/stuff in. And arrange the boxes neatly. Should be alright from there. Option 2) Straight up hardcore strict. Give your child boxes first. Then a warning. If you want to play, you must learn to keep. If your child doesn't keep the toys, confiscate one toy from the box(this only works if your child has more than one toy) and only return it if they have successfully kept their toys in the boxes. In a child's mind, being neat just means visually no mess. So theres a good chance the toys in the box are a mess too lolol. but baby steps! Option 3) This requires commitment from either you or your partner. Wait until your child is playing or making a mess. During that mess, you casually walk in and 'slip' on one of the toys and you fake a fall. One of the hidden techniques WWE wrestlers use to create impact of injury is when they fall, then slam the floor with their hands so it 'sounds' like a heavy impact fall. Also helps to groan and repeat pain pain pain pain pain ow ow ow. If you need reference just youtube The Rock WWE and study his reactions. Anyway, after that your child should definitely be shocked and start worrying for you(if not then we got another problem) thats when you say, "MESSY IS DANGEROUS FOR US. MESSY CAN HURT" and like, advice her on how to stop from accidents like these happening again.