We got our 8 year old an ICB. She tried reading it several times. It is now shelved and she wanted a NKJV like her dad. She reads the NKJV and says that it is easier to understand.
You are claiming that the NKJV is easier to read than the NCV? That is very unlikely.
2 Cor. 6:12
NCV : Our feelings of love for you have not stopped,but you have stopped your feelings of love for us.
NKJV : You are not restricted by us,but you are restricted by your own affections.
2 Cor. 6:13
NCV : I speak as if you were my children. Do to us as we have done -- open your hearts to us.
NKJV : Now in return for the same (I speak as to children),you also be open.
Philippians 2:27
NCV : Yes, he was sick,and nearly died,but God had mercy on him and me too so that I would not have more sadness.
NKJV : For indeed he was sick almost unto death;but God had mercy on him,and not only on him but on me also, lest I should have sorrow upon sorrow.
Hebrews 7:18
NCV :The old rule is now set aside,because it was weak and useless.
NKJV : For on the one hand there is an annulling of the former commandment because of its weakness and unprofitableness.