FAMILY TREE FOR BLENDED FAMILIES
I recently was on the National Archives Website and was delighted to find a Family Tree for a family with two parents. And brilliantly a family tree for a four parent family.
The tree included a space for a mother and step-father and a father and step-mother.
It felt very inclusive. May I recommend a similiar option for FamilySearch.
It has family tree charts and activities for children.
It is located at https://www.archives.gov/education/family-history