Ask the Midwest

I'm currently decluttering and reducing to get a handle on my home, and I've come to a conundrum of how many plates/bowls/cups/etc do I actually need? I have 2 young kids that we'd prefer not to have to run to the store at 8pm to buy more plates because someone ruined a plate, but very limited cupboard space (small 120-something year old house with a kitchen that was built in the 50s)