I agree with Annie, get them to come up with a list of chores that need doing. Then they can be divided up between them and rotated so one child doesn't have all the horrible chores. Here are a few that you might suggest if they are struggling.
- Unload dishwasher or washing up/drying/putting away
- Setting the table
- Picking up toys/books/games etc
- Feeding animals
- Cleaning animals out (cages, litter trays etc)
- Making their bed
- Watering plants
- Sewing any lose buttons back onto coats or school shirts
- Cleaning the bathroom
- Cleaning the windows
- Washing the car
- Hanging the washing
- Making their packed lunch
- Helping to make dinner
- Cleaning their shoes
- Emptying their school bags and giving you any letters.
- Hoovering
- Moping floors
- Dusting
You could have points for each chore and those points could be transferred into pocket money or staying out later on the weekends. If you can all work together the house can be spotless!