My daughter has been a helper since she was 2. We encouraged it despite the very obvious frustration and now we have a somewhat competent helper years later.
For anyone unaware how frustrating it can be. Watch the Omelette episode of Bluey...
She was expected to do chores as soon as we believed her capable. That included bringing her dirty laundry to the laundry room. Putting dirty clothes away. Cleaning plates before putting in the dishwasher.