I have made a list showing chores that children can do to help at home. They are simple chores that young children can do as well. There is also a chore list on which you can fill in the chores yourself. I suggest to do this together with your child so you can both decide what he / she could do. 
I personally use the card for a few months now and my kids do love to help me and do chores. As a reward, they are allowed to choose a movie that we can watch as a family on Friday evening. To earn their reward they need to have done at least 20 chores. 
I can highly recommend this kids chore. You'll also notice that your children can do a lot more than you previously expect of them.