After reading the list, thinking to myself, If I had just one wish from all the things pinball related as the best "toy" in the box, I am going to have to go with one that makes every modern day machine what it really is, and it isn't even technically a toy, but it is ubiquitous now, almost required by every machine made. Yes I am talking about the auto-plunger.
Without the auto plunger, half of the spectacle of the "show" these days would not be available. Coupled of course with any (usually extra costly) on-table physical ball locks, it makes every multiball start something that can happen at any time and during any event. No more need to physically stop the ball just to start a multiball.
You could take every other toy and ditch it as long as it can start and play multiball, because that is my favorite toy.
It is why when combined with great bash targets like in MB, and you have great multiball modes to go with it, there is nothing more satisfying than keeping multiple balls in play, and not just trapping up and shooting with 1, but "juggling" all of them at once.
I think this was the attraction of TNA, which, for some reason just didn't connect with me, but that was based more on theme than game play for me. As a former nuclear reactor operator for the US Navy, reactor shutdowns was just not something we liked to do.