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.
This is especially true with booster seats that can be used with the car's three-point seat belt rather than a harness. In Consumer Reports recent tests of booster seats, we found that 80 percent of manufacturers suggest a weight limit typical of a child well under three, which is too young for a booster seat.n average 40-pound child is typically closer to age five, a much safer age to consider making a transition to booster use. And many booster seats that can be used in both a highback and backless configuration have a higher minimum weight limit of 40 pounds when used in the backless mode.