Subscription Box Ideas? Which one?

I am looking start a new subscription box service and wanted to know which boxes would you purchase if you had to buy a box. I have narrowed my ideas down because I had so many. monthly subscription

Underwear/Sock box - for kids, men & women

Dental Hygiene Box- toothbrushes,tooth paste, mouth wash , timer for kids and a bonus item every month

Chore Box for kids- app that tracks when kids finish allowance and sends a subscription box based on their interests.

Period Box- comes with an app that sends out a subscription box around the time of period with your period needs.

I know I posted before but I narrowed it down.