I don't know about you, but the easy solution when I want to motivate my kids to do anything is SUGAR. Because I don't want them to be unhealthy and equate food with rewards, I am always looking for alternatives to candy to help motivate them to practice.
The main tools a young child needs to practice effectively are the following:
1. Parental support/ involvement (because no child is going practice what you want them to practice unless you're there to help them)
2. An itemized list of tasks to complete (at Upper Beaches Music School, we use practice charts that our teachers fill out weekly)
3. A motivator to accomplish the tasks properly (best if it is visual- and the games below are great starting points)
4. A sense