I'm a school bus driver for grades k-5 and 6-8, my littles are always saying 6,7 and instead of allowing it to bother me, I decided to go with the flow and print them a keychain / backpack charm.

I found the numbers on thingiverse, number design credit to: Numbers by Borg7of9 on Thingiverse: https://www.thingiverse.com/thing:1658701

I printed them in their school colors red, white, and blue Filament color changes were @ layers 25 and 35 (double check your layers)

I printed 10 at a time on a Creality Ender 3 Max Neo 100% is just under 66mm tall x 54mm wide x 10mm thick (20% infill / no supports) I chose 20% infill for durability with children, adjust as needed.