Whatever your hand finds to do, do it with your might, for there is no work or thought or knowledge or wisdom in Sheol, to which you are going.(Ecclesiastes 9:10 ESV)
I guess most parents struggle when their kids are flatly unwilling to pitch in and do a fair share of work around the home. The exact expectations may vary from family to family and between cultures, but part of our task as parents is to train our children in how to work.
God values work, He set Adam the task of tending the garden even before the fall:
The LORD God took the man and put him in the garden of Eden to work it and keep it. (Genesis 2:15 ESV)
When we work we glorify God by doing what He created us to do. After Adam and Eve sinned work became harder, but it is still part of our purpose and so does not have to be a demeaning burden. By teaching our children that work is an expression of what is good about being human and that it glorifies God, we help them to become willing to work hard.
Pray your children grow into understanding a Biblical perspective on work which enables them to accept it will not be easy but that there is a purpose in all work. Ask Jesus to help them see that as our Father is working, so too it is good for us to work.