Editor's note: Join " Raising America with Kyra Phillips" on HLN Friday at 12 p.m. ET for our special, " Protecting Our Children: Taken." We’ll show you exactly what you need to do in the first 24 hours your child goes missing. We’ll also show you how you can track your child. We put three gadgets to the test. Click here to RSVP on Facebook and invite others to watch.