Regenerate the top part.

The splitting doesn't actually kills the doll - just its bottom half.

The upper part, on the other hand, shrinks a bit in size and regenerates. After some time passes, it can produce a new doll on its now-empty insides.

This way, the doll population will increase steadily, as most other living beings. They would only truly die from old age, predators, accidents or kid-induced acts of doll terrorism.

Regenerate the top part.

The splitting doesn't actually kills the doll - just its bottom half.

The bottom half becomes a nest for the little doll that was gestating on the inside of the "mother doll" for a bit, until it can go around hunting for cookie crumbles for itself.

The upper part, on the other hand, shrinks a bit in size and regenerates. After some time passes, it can produce a new doll on its now-empty insides.

This way, the doll population will increase steadily, as most other living beings. They would only truly die from old age, predators, accidents or kid-induced acts of doll terrorism.

Regenerate the top part.

The splitting doesn't actually kills the doll - just its bottom half.

The upper part, on the other hand, shrinks a bit in size and regenerates. After some time passes, it can produce a new doll on its now-empty insides.

This way, the doll population will increase steadily, as most other living beings. They would only truly die from old age, predators, accidents or old age.

Regenerate the top part.

The splitting doesn't actually kills the doll - just its bottom half.

The upper part, on the other hand, shrinks a bit in size and regenerates. After some time passes, it can produce a new doll on its now-empty insides.

This way, the doll population will increase steadily, as most other living beings. They would only truly die from old age, predators, accidents or kid-induced acts of doll terrorism.