Ding Dong

Ms. Frog once had
A set of twins.
She named one Ding
The other Dong,
I told Ms. Frog,
If I’m not wrong,
That Ding’s not Ding
She’s really Dong.
But Ms. Frog said,
“That just can’t be.
Just look real close
And you will see.”
So is Dong Ding
Or is Ding Dong?
Ms. Frog and I
Can’t both be wrong.
There’s just no way
That you can tell,
‘Cause they both run
To the doorbell.