Children don't necessitate a consumption spiral. The fact that they grow so quickly means there's plenty of cheaply available used items (clothes, books, toys, etc.). If you have multiple, or if they have cousins, then there's also hand-me-downs. Then there's free stuff like parks or libraries, or e.g. our county has a nearby recreation center with a splash pad.

We did buy a more expensive home to live near better peers, but that's not really a consumption issue; it's a cultural one.