Tom and daughter,
Welcome to C/L profile scale. I was one of the static judges for profile at the 2003 Nats and have flown the event several of the preceeding years. Let me offer a different approach. The builder of the model rule is satisfied if the contestant constructs the model from the equivalent of a typical kit. This means that you could cut out the parts for any plane she wants and she can assemble them. Find a plane she likes and get your documentation drawings. Then take the drawings to Kinko's or some other copy shop and have them enlarged to the desired size--probably 36 wingspan for the .15. Then use the plans to make her kit. Wood sizes the same as her trainer ought to work. The slab fuselage and tail surfaces should be no problem; just trace them. Use any wing airfoil you like, even the scale one! Scale incidences will work for most normal airplanes. Set the CG at 20 or 25% of the wing root cord. The taxi option for the flight routine is a good one for throttle only aircraft. In my experience a wide main gear works better than narrow. Feel free to send me a PM if you want any additional information.
Chuck