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 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. 2  For most kids, they will be between ages 8 to 12 year old. 3  We know that when adults wear seat belts, kids wear seat belts.