TWO-BALL SOFT TOSS
Get two different color whiffle balls (say red & white) or mark half of the balls with a different color dot.
Works better with whiffle baseballs or even golf whiffle balls.
Its easier to toss smaller balls plus helps hitters in focus and coordination.
Toss the two balls at the same time (from same hand) and ask the player to hit one of them, either red or white.
This helps players to coordinate, focus and react to hit the correct color ball.