I got a separate card from #GS3 (at age 1, I know he didn’t initiate it, but I appreciate it anyway) “signed” with his scribble. They also included one of his artworks ... when he draws something, he’s as proud as can be ... and though it may be an abstract scribble, he pours a lot of effort into them.
His cousin ( #GD2 ) is the art child, but she started in just this way (albeit I think she took up art around age 2, so he’s starting earlier).