Here's the information I want every family to know. Children are falling from windows at an alarming rate – more than 3,300 kids five and under go to the emergency every year. Window falls are a completely preventable. All windows should have window guards, child safe window stops or 4-inch window opening limiters. We recommend Guardian Angel window guards, KidCo window stops or KidCo mesh window guards because these all meet ASTM safety standards.