Hey , Is it hard to wake up in the class?
Don’t you find yourself keep nodding?
Put this NONOD HAT on! This hat can be a answer!
Control your sleep!
Instructable link
http://www.instructables.com/id/NO-NOD-Vibration-Hat-to-Wake-You-Up/
NONOD – VIBRATION HAT FOR DOZER
Where is the link to your Instructable? I can’t find it! =D