Not that I’d get it, but I’m thinking Charlie might once have been entranced by this number scarf from the Little Factory. He learned 1-10 quickly and easily when he was 2 1/2 and had a certain fascination with 3 (he’d turn a letter E block backwards to make it look like 3) and, sometimes, 8. Letters were much harder for Charlie to learn. So many more of them, too many rhyme with “ee,” and what do you do about b/d/g/q/p all looking just alike enough to be close cousins?
(Yes, there’s a letter scarf too, and it’s almost sold out.)