When Evangeline Fuller stopped using a booster seat in her family’s SUV last year, she was so excited.

“I felt like I was growing up,” says the fifth-grader from Washington State.

But now Evangeline—and many other kids in her state— is back to sitting in a booster. A new state law requires kids to use the seats until they turn 13 or reach a height of 4 feet 9 inches, whichever comes first.

Why are kids in Washington getting a boost? Sitting on a higher seat puts them in a better position for their safety. Seat belts are designed for adults, so the strap doesn’t always cross kids’ bodies in the right place.

Like many kids, Evangeline isn’t thrilled about the new law. At 10 years old and 4 feet 7 inches tall, she knows it’ll be a while before she’s out of a booster again. But she’s trying to look on the bright side.

“It does feel more secure when I’m in a booster seat,” she says. “And I guess I can see out the window better.”