This conventional type of mouse can be used for various tasks. Children, or adults with smaller hands, might find that this mouse works well for them.
From Amazon
Kensington Trackball Mouse - Orbit Mobile Wireless Mobile Ergonomic TrackBall Mouse with Touch Scrolling, Ambidextrous Design and Optical Tracking - Certified to Work with Chromebook (K77600WW)
Ecprof
K77600WW - MC K77600WW Orbit Wireless Mobile Trackball 2.4GHz USB Rece