Omg!
Your girls are adorable. I also have 2 daughters, ages 5 and 8. My 8 year old always wants to wear my MAC eyeshadow and lipglass.
Regarding the shadesticks, I just have one which is Sharkskin and use it mainly for eyelining. However, I think you can use them like an e/s base, but I always use Bare Canvas paint.