I had only two little girls who could write their names before JK, but none of the boys. I have seriously given up trying to get them to print letters and now I use flashcards all the time for visual recognition of letters, numbers, shapes, colours, etc. but every time I give them letter tracing pages or anything similar they do as you described, just scribbling. Only the two little girls who could print their names also made lovely pictures at age 3/4 too.

I have decided that is a job for the JK teacher!