How does the jelly get in a donut song go that was on Captain Kangaroo?

Here's the song as requested.

In a donut shop not far from here,

There lived a donut filled with cheer,

He dreamed of jelly every night,

And wondered how to gain some bite.

Each day he'd watch friends filled with fruit,

They smiled and waved, but stayed aloof.

Our lonely donut longed to taste,

The special jam inside their waist.

One night, he hatched a secret plot,

To squeeze inside the jelly pot,

He wiggled, shook, and made a jump,

And landed headfirst in the plump.

Oh what delight, the sticky sweet!

The donut danced with jelly feet.

His jelly dreams had finally come true,

Now every donut's filled with goo!