I don’t know if your S has bought something yet, or has time for delivery, but my geeky kids like thinkgeek.com and they have a section for gifts under $10: http://www.thinkgeek.com/interests/giftsunder10/?icpg=Holiday2015_gc_intro_giftsunder10
I don’t know if your S has bought something yet, or has time for delivery, but my geeky kids like thinkgeek.com and they have a section for gifts under $10: http://www.thinkgeek.com/interests/giftsunder10/?icpg=Holiday2015_gc_intro_giftsunder10