Great for a 5 yrs and beyond. Talking about how the body operates and why to care for herself.  Why her diet must fuel her body...  So cool that she wants to know....  What is this for?,  How does this work?  and inquisitiveness has developed her own powers of common sense and to think...  "If this works this way, then maybe that will work the same way..."  She's trying to figure it out for herself and I love how inventive she is becoming...  HOPEFULLY  not afraid of failure...  Just try again!