A pygmy marmosets's interlude is a Proboscis monkey: The First Juvenile Release (Human).

A pygmy marmoset’s break is when a proboscis monkey gets a human kid’s body and acts like it’s the best thing ever. It’s not.

The proboscis monkey got a human body and started yelling in the grocery store.

My friend’s kid became a proboscis monkey and started eating homework.

The monkey kid got released and took over the school.