Math Tutor For Advanced 4th Grade Level Math

Looking for a tutor to create a curriculum to make learning math fun for advanced 4th grade level student. His interests are space, geography and architecture. He masters mathematical concepts quickly and does not need a lot of practice. The school work he has is too easy for him and we'd like him to progress through math skills at his own pace, which is fast. Tutor would be responsible for identifying gaps in his math knowledge and making practice problems that relate to his interests to demonstrate how to approach different kinds of math problems. Not working through a workbook but you may use a workbook as a guide. In person preferred but open to trying online for the right fit. Oh yeah, and he is 5 years old.