Go to Towadakohan Onsen with your family this summer vacation! What are the best hot spring inns for families?

I would like to take a family trip to Tohoku with my husband and two children (elementary school students) for one night in July or August during summer vacation. We are interested in Towadakohan Onsen in Aomori. We are looking for a family-friendly inn with hot springs. For example, could you tell us if there are any recommended points, such as a family bath or lunch for children?