Words are just little pictures with particular semantic meaning. My 33-month old definitely recognizes the word "no" in a few different fonts; that doesn't mean he can read, he just knows what the word "no" looks like

Sure, but the title cards for Bluey episodes are far more recognisable for a 3 year old than words. What do you think they recognising in the "Squash" episode - the word "Squash", or the squash racket in the picture?