This chapter book can be a read alone. This is also another adventure with Amy. This time she is having a short visit with her grandparents. She has been told stories about the wee folk and fairies most of her life. But will be her first time being able to get to know a Rubump on a personal level. There adventure include inventions and getting lost in another realm. Finding out ways to feel as if you were very small and hopefully helping your imagination grow in great ways. What are they inventing next. And just what is a Rubump?