Failure to secure children under age six in a federally-approved child safety seat is a traffic violation punishable by a $25 fine and one point assessed against the driver.

Children up to age six must be properly secured in a federally-approved child safety seat when in a moving vehicle. Violation of this law is punishable by a fine of $25 (plus court costs) and the assessment of one point on the operating driver's record.
DMV Writen Test