I have a 5-year old who seems to have a knack for math. She can borrow/carry in the hundreds, she can do multiplication through 5's, etc. Her teacher is not differentiating her work, so I do feel like I need to meet her where she's at when at home. However she is only 5, and I want her to enjoy math and not burn out. Any ideas on how to challenge her in a fun, enjoyable way?