So stick with me here for a moment of brutal logic:
1/ I assume that most bike riders make allowances that children may do anything at any moment, in any place, stop sign or not, and that this law would not change that, nor would it change the behavior of children.
2/ The law is aimed at the interaction between bikes and cars, not bikes and children.
3/ If the Gov assumes that this law will change something, he's making an assumption outside of those two points so perhaps he should address what appears to be a problem he has either with children driving cars, and enforce those laws more strictly, or he should move to stop licensing young children to drive cars, if that's his problem..
4/ The other possibility is that his statement makes no sense at all.