To delegate a task to a child, you must show them how to do the task first. Do the job yourself and let them watch. Then let them help. Then let them do it while you watch. Finally, let them do it alone.
By teaching your children to put away their things and do their household chores they will grow to be independent, organized, responsible people. But they can only learn by you showing them.
Do more with your children and less for them.