S.H.
The way I look at it is this: (we have child sized play tables for my kids)....
but, if they scribble on it, so what. Just get "washable" Crayola Crayons and markers.
There is such a thing. Easily found.
Next, what I also do is, (I have a huge roll of butcher paper), I put a sheet of butcher paper over the table... and then as my kids scribble or mark it up, I just tear it off and replace it with another sheet of paper. Or, I put the date on it, and save it as a 'souvenir" of their 'drawing' progress and development.
If you want the table to be 'presentable' and all nice and clean... well, that is hard to do, with a kids table for kids' purposes. It will, probably, inevitably, get marked up.
Our kiddie table is a nice solid oak wood table. It is nicely, worn in now... and even marked up. But I can just repaint it or refinish it if I want.
I don't try to keep it all spot free or mark free... because it is for my kids. I don't care, if it is that way, even if company is over. That is just me.
all the best,
Susan