1. Open the "Instruments for Kids" app on your mobile device.

2. On the main screen, choose one of the four available instruments: piano, xylophone, harp, or drums.

3. Tap the icon of the instrument you want to play. This will take you to the play screen for that instrument.

4. Use your finger to tap the keys, strings, or drums on the screen. Each tap produces a musical sound.

5. Explore each instrument by playing different notes and sounds. Try creating your own tunes or just enjoy the fun sounds.

6. To switch to another instrument, tap the home button or back arrow to return to the main screen.

7. Select a different instrument and continue playing.

8. All instruments are designed with colorful graphics and easy-to-use interfaces, making it simple and enjoyable for kids to interact with.

9. There are no time limits or scores, so children can play freely and creatively at their own pace.

10. Encourage kids to experiment with sounds, rhythms, and melodies to enhance their musical skills and creativity.

11. To exit the game, press your device’s home button or close the app from the task manager.