If you want your child to succeed at violin, you should set up an environment which includes
- listening to music
- watching others play
- practicing regularly
Most people need to practice at least five days per week to make progress in any violin method. Practice should not be long, especially for a beginner, but even a more advanced student shouldn’t just put in more practice time for it's own sake. My high school senior practiced 20-30 minutes a day, and he played very well. For the very young student, much of practice might be watching the parent learn to play. Routine can help violin practice become something one does, like eating dinner or story time.
Listening will make that time pay off more. You can start listening right away. Check out some music CDs at the library and listen to them every day. Bedtime is good, so is indoor play time or homework time. My daughter would listen whenever she used the computer for work or play.