I know some you are probably freaking out about all of the mess and the water and bubbles everywhere and granted, that is going to happen, but just look at his focus, he was so into this and did a really great job at it too.
Save all of the non breakable easy to wash items from the day and whilst you are preparing dinner, get the toddler set up at the sink. Don't forget that their little fingers can't tolerate the water as hot as we can, add plenty of bubbles for that fun factor, a chair or stool to stand on and let them at it.
When they are done, they will no doubt be soaked through, great time for a bath (unless of course dinner is ready hehehe) and the floor will be a huge puddle. Well it needed mopping anyway and you don't even need to fill the bucket.