Toshiya started making these back in 2012 on his Pixiv without giving it a proper title, hence the name Wakabayashi Toshiya's 4-koma Collection. In 2015, it started serialization in the Weekly ShÅnen Magazine under the name Tsurezure Children. He released a lot of the chapters that are present here into the serialized version, albeit entirely redrawn, so many of the chapters overlap. Afaik, he doesn't post any new chapters to his pixiv, and the story has entirely shifted into the magazine version. So yes, this is essentially the Tsurezure Children manga, just not the serialized version. Better off just following that series and not this one.