But, I wonder if there is any way to allow the child to play the keyboard while not having these things influence the child.
No. And make sure they don't press any black keys, they should only use the white ones.
No minor chords, either, and especially no diminished ones.
In fact, only fourths, fifths, and octaves ought to be played because only they are "perfect," i.e. God-like.
We wouldn't want to settle for anything less.