It is most deffinatly accurate to say that children have more dreams and Lucid dreams.
First of the youger you are the more REM sleep you have when dreams accur.

Age
3-5 months -daily sleep = 8-16 hrs + Rem sleep =40%
6-23 months

3-5 years - daily sleep = 9-10 hrs + Rem sleep =20%
10 -13 years

33-45 years

So as you get older you tend to sleep less and have less Rem

But the greater thing I feel is going down the same line as Amethyst Star. The mind has not yet labled and interpreted things. And is very impressionable.

The saying comes to mind -"You can't teach an old dog new tricks".
I mind set is a hard thing to change.