Because I'm such a grinch that this lovely border in my preschool classroom makes me irrationally angry.
I mean, look at this thing. It's frikkin' adorable. It's bright and colorful. And totally wrong, wrong, wrong. Look at that key signature. What is that sharp doing? It is hanging out on the E! No! Bad sharp! FCGDAEB!!!!!! Fat Cats Go Down Alleys Eating Bugs! There is no key with only an E-sharp.
Now, look at that treble clef. It's not too bad, but if I had drawn a treble clef like that on a notation quiz in 3rd grade, I would have failed. The top should go above the F. The curl should go around the G.
Now, look at those eighth notes. Why do some of them have dots? Dotted eighth notes without a sixteenth note to follow are not a thing. And while we're looking at the rhythm, what on earth kind of meter is this? I see measures that can only be in 7/16 and measures that can only be in 5/16 and measures that can only be in 3/8.
Why is there a natural next to nothing?
Why is there a random quarter rest?
I AM CONFUSED, MUSIC BORDER! I CANNOT UNDERSTAND YOU, MUSIC BORDER!