Pencil Finger Fidgets - They allow the student to have something to chew on or move around in their hands. Students that require such fidgets have a need for sensory stimulation, and fidgets provide that within the classroom setting.
Interesting idea: Hide Common Core questions under their seat and announce 'hot seat' sometime during the day. Whoever has a question under their seat has to answer it. I think this could be made a little more engaging.
Help your students understand how protons are the positively charged particles and electrons are the negativley charged particles by charging their own iPod with an onion. Um you can charge your iPod with an onion?