Or he can use SN754410.
Up to 1 Amp and can control 2 motors.
Ready to use IC
http://focus.ti.com/docs/prod...54410.html

Ravi P: you can change direction with 2 I/O Pins from the microcontroller.

Don't forget to use optocouplers between uC and the motor.
I use MCT6 you can use any other
http://www.fairchildsemi.com/pf/MC%2FMCT6.html