New-house blues--lightly but divertingly overcome. The house that eight-year-old Nikki moves into with little sis Shirley and her enthusiastic parents is a big old Victorian sort of pile--so she's bound to succumb to the charms of two sets of stairs, a wrap-around porch, and most of all a backyard gazebo. Especially with outgoing, adventurous Jeffrey as a neighbor and, shortly, co-conspirator in Nikki's scheme to return to her old home-ground when best-friend Lisa comes for a visit. But on that day everything goes awry: Lisa isn't enchanted with the string spiderweb Nikki's made of her room (not wanting to settle in); she talks comfortably, traitorously, about the newcomers in Nikki's old house; and she's dead wrong about how to make new friends--why, Shirley finds a dog-buddy, and Nikki a girl-classmate, just by walking around the block. So by the time Lisa leaves, Nikki's rather relieved to see her go--and a family race to the gazebo in the rain then makes the new house ""really home."" There's a kernel, at least, of psychological truth--with pleasant if stock embellishments.