Maia and the very tall wall

"Maia is a curious girl, with lots of questions that she asks anyone who will listen. Behind Maia's house is a peculiar stone wall. As Maia grows older, she notices that the wall grows too. While the wall gets higher and higher, Maia grows shyer and shyer. Before long, she is afraid to ask her questions out loud, and the thing she wants to know the most is, what is on the other side of the wall"--Adapted from publisher description.