All you need is a phone line! All phone lines have a constant flow of voltage, around 40-70 volts (up to 100 volts when it rings!), but you can't just plug stuff into it and expect it to work.
Children older than 5 and more than 40 pounds must ride in a booster seat until the child is 8 years old or is taller than 4 feet 9 inches. Anyone over the age of 8 must be protected by a safety belt.
1 The shoulder belt should fit across the shoulder and chest. 2  Older kids get weighed and measured less often than babies, so check your child's growth a few times a year. 3  Generally, kids need to use a booster seat until they are at least 4 feet 9 inches tall and weigh between 80 and 100 pounds. Older kids get weighed and measured less often than babies, so check your child's growth a few times a year. 2  Generally, kids need to use a booster seat until they are at least 4 feet 9 inches tall and weigh between 80 and 100 pounds.