Macbook Cursor does not show My daughter's Macbook Air does not show a Cursor, although ⌘+Tab shows it.
How do I force it to display normally?
Try following troubleshooting steps:

1 - Start in Safe mode (reboot, hold shift right after the startup chime)

if cursor shows then it is a 3party software

2 - Log in as other user (Guest)

if cursor shows it is your (daughters) user profile that needs fixing

If none of above worked, it is your Trackpad app that needs fixing.