for Ben the Inventor by Robin Stevenson and David Parkins
Inventors invent inventions! That's what Ben and his best friend Jack like to say. So when Ben discovers that Jack's family is planning to move to another city, he decides they should put their inventions to work. The boys figure that if no one buys Jack's house, Jack won't have to move away, so all they need is a plan to scare off potential buyers! Inventors are good at coming up with plans. But when Plans A, B and C fail to bring the results the boys had hoped for, Ben discovers that not everything in life stays the same-and that while change can be hard, sometimes it isn't all bad.
Publisher description retrieved from Google Books.