Children Cannot Sin

D&C 29:46-47; But behold, I say unto you, that little children are redeemed from the foundation of the world through mine Only Begotten; 47 Wherefore, they cannot sin, for power is not given unto Satan to tempt little children, until they begin to become accountable before me.

Romans 5:12; Wherefore, as by one man sin entered into the world, and death by sin; and so death passed upon all men, for that all have sinned.

Man if this passage in D&C is true then God owes me an explanation about my kids.