Kids love to help out in the kitchen, and tend to get more joy out of eating something they (helped) make. It's a good idea to have your child help you prepare meals and snacks for the family. The tasks should be age-appropriate.
Having your child help in the kitchen is a good way for them to foster healthy eating habits. Many times, you will need to teach your child the skill, and he will need to perfect it - that takes time and effort.