Teaching kids about circuits (only) is akin to teaching them how to use a ground fault protector ‘button’ yet nothing about the main breaker switch upstream in the panel. Zebra lights CAN use protected cells in their lights which they previously did and still do AFAIK. Your head (headlamps) and hands (flashlights) are worth so much more than whatever you are trying to accomplish otherwise.
What you are saying to kids is this:
Do not purchase or rely on low voltage protection circuits from (?) regulated or overseen by (?) especially when there is an option for using protected (loose) cells which are not only replaceable but easily troubleshot over time.
Vaping with unprotected cells to boot teaches kids absolutely nothing concurrently. (sorry, vapers).