With school approaching, i have been thinking of getting my 4 year old some type of tracking device. He has autism, and tends to wander off at times, hes hyper active and he also has NO boundaries so he will be over friendly and comfortable with strangers. I always think of the what ifs, and now that he will be taking the bus, i just want a piece of mind while i stay home caring for the newborn. Any suggestions? I have looked into so many devices with mixed reviews and dont know what's better...