Exactly. The kid looks to be 3 y/o. At that age, they are in the *scribble* stage.
The scribbles are his; the symbol? No.
I have a five year old grandson who has been building bridges out of blocks and popsicle sticks and paste since he was two. His brother, now two & 7 months, constructed a “helicopter” by finding the hammer and some nails and nailing two paint stirrers in a balanced X to a 6” piece of two by four while Mom was hanging up clothes in the back. “I only tapped my thumb once and it didn’t make me cry.” I think he knows more words than I do and has better grammar.