Connecting a mouse via cord is as easy as it gets, and you'll never need to charge it or change batteries. Children, or adults with smaller hands, might find that this mouse works
From Amazon
Mad Catz The Authentic R.A.T. 4+ Optical Gaming Mouse, Black
Ecprof
MR03MCINBL0000 - R.A.T. 4+ Gaming Mouse, USB 2.0, Lightweight with Adj