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
Perixx PERIMICE-713 Wireless Ergonomic Vertical Mouse - 1000/1500/2000 DPI - Right Handed - Recommended with RSI User
Conrad Electronic
Perixx Perimice -713 Ergonomic mouse Radio Optical Black 6 Buttons 2000 dpi Ergonomic