Free idea for different 510 toppers? Or "mod-toppers"

1) laser/flashlight/torch? (Already done by: )
2) fan
3) plastic bag sealer
4) vibrator (micro-etcher)
5) toothbrush
6) shaver
7) micro-vacuum (blower) hi-volume low-pressure) ---tech duster
8) micro-pump (vacuum) low-volume hi-pressure) ---bike tube or pressure sealer.
9) USB-out (charge)
10) Screwdriver

 

Free idea for different 510 toppers? Or "mod-toppers"

Thanks for posting these ideas, I am moving this to general mod chat for you.