This particular model is wireless, so you'll never have to feel constrained by cords. Children, or adults with smaller hands, might find that this mouse works well for them.
From Viking Direct
CHERRY MW 2310 2.0 Mouse Ambidextrous RF Wireless Optical 2400 DPI Black
Ecprof
JWT0320 - Mouse MW 2310 2.0 Wireless black
This product is also available at 4 unverified stores.