In our house, everyone has chores to do. The older kids have daily chores like helping with dishes, and the younger kids have chores they do weekly like emptying garbage cans or dusting. It's funny how the younger kids want to do chores, while the older ones sigh when they have to do theirs. How do you get the kids to continue their enthusiasm for helping out around the house?
A BIG mistake I made with our older kids was to squelch their desire to help out. They weren't doing it the way I would, or it would just be easier to do it myself. As we added children to our family, I realized that I couldn't do everything myself and needed help. The older kids didn't have chores to do when they were younger, so when they were older and I was asking them to do things, it really WAS a chore!
The biggest way I've learned to help our kids retain the enthusiasm for helping around the house is just to let them. Our 6 year old recently wanted to help fold her clothes. I gave her the washbasket and she folded them all. They were far from perfect, but they were folded(ish ☺). I gave her lots of compliments and praise, and we put them in her dresser together. She was glad to help out and was satisfied that she did a good job. With our older kids, I KNOW I would have refolded them and crushed their hearts and desire to help out again. My heart hurts knowing that I did just that.
Let your kids work side by side with you. It won't be perfect, and probably won't be pretty. But as they grow and learn, you will be happy to have their help~with glad hearts.