The video has one extra line in addition to the lyrics above (just before the 2nd to last line). The line is "para sus hijitos" (for her babies).
Please let us know if you think this video has been taken down by YouTube.
Thanks to Rachel from My Spanish Games for sharing this animation!

Sheet Music

Sheet Music - Rana Cucú

Thanks and Acknowledgements

Many thanks to Olga López from GLF Venture Inc. for contributing and translating this song

¡Muchas gracias!