Inputs Of Interest: BIGtrack Mouse Might Make You Squeal | Hackaday
BIGtrack trackball mouse assistive technology for children
Amazon.com: Ablenet BIGtrack 2.0 Trackball - for Users who Lack Fine Motor Skills to Use a Mouse. A Big 3” Trackball with 2 Blue (Left and Right Mouse) Buttons -#12000006 (Switches Not Included) : Electronics