The sister is eight though. My cousins are 9 and 5 and they work together well - probably to the standard of a 10 yr old or more. I doubt the gap is that massi

The sister is eight though. My cousins are 9 and 5 and they work together well - probably to the standard of a 10 yr old or more. I doubt the gap is that massive (and more in "maturity" than intellectual)