The following tips may be helpful for parents seeking to get children involved in household chores:
1) ask children to do chores in exchange of an activity to let them to see chores as a necessary step in ones life.
2) Arrange home in a way that allows children to perform the chores, that is, storage and cleaning tools of a size that children could reach and deal with.
3) Allow them to finish a task they’ve started; do not do the task for them.
http://www.todaysparent.com/kids/preschool/how-to-get-your-preschooler-to-help-with-chores/