Embullient

adj: exhilarated, full of enthusiasm and high spirits

1. Cheerful and full of energy: "she sounded ebullient and happy".
2. (of liquid or matter) Boiling or agitated as if boiling: "misted and ebullient seas".

The ebullient child exhausted the baby-sitter, who lacked the energy to keep up with her.

Synonyms: ardent, avid, bubbly, zestful