Symmetry in Chinese Characters
Chinese characters are pictorial, as everyone knows, but symmetry can actually plays a role in some characters, adding geometry into the curriculum. Finding and using these new and fun ideas tailored to your child’s level of need can provide some sparks to an otherwise dry and rote-learning method.

Is there a list of those characters?
一二十三川工口囗王丰井中日曰旦田由甲申目回吕亘串車昌噩. I am sure there are others. And there are those that are not quite symmetric in original form, but if a certain font is used, or that we stretch them a bit to be, like 來 or 春, they can still be classified as that. When used for educational purposes, we need not be so precise, as long as the children are thinking about the characters and having fun doing it!
I agree! So visual. It helps them to remember.