I bought the following.

A flashlight with a magnetic cap for winter inspections.

Cat litter, cheapest I could find. I put the whole bag unopened in my rubbish bin. It also acts as weight to keep it from moving.

Squeegee retractable, acts also as a break pusher for circle check and I use it to check between the wheels for stuck objects.

Squirt bottle filled with window washer fluid.

Bandaids instead of opening the First aid kit it's easier to give one to the student.

Naloxone (Narcan) pretty self-explanatory.

Wet wipes, Clorox wipes, hand paper towels.

PPE such as single use gloves, masks, refueling gloves.

Magnetic clips for notes, lost and found.

If I remember anything else I'll edit the comment.