Marketplace reveals the investigations have led to change.  From removing unsafe products from store shelves to changing government and company policies, we take viewers on a journey of some of our most memorable and meaningful moments. Reporter: Charlsie Agro

Marketplace investigates how much information you're giving away when playing mobile games, and where that information ends up.  We uncover the methods app developers use to keep kids playing for as long as possible – and expose loopholes in the laws meant to protect children's privacy.