Children getting words mixed up.?

Does anyone want to share some amusing incidences where children get words confused/mixed up? For instance this 9 year old grand-daughter amused me with this:

She was watching the movie Transformers, the mother in the movie asked her son was he masterbating as he had his bedroom door locked. My grand-daughter asked "mummy what is masterbating"...her reply, oh I'll tell you about that when you're older. A few days pass be and grand-daughter is still curious about the word and keeps asking mum & dad about masterbating. My daughter quickly explains it's when boys play with their penis and it gets hard...but there is more to it I will explain some other time.

A few more days go by, 3 year old grand-son is coming out of the shower and drying himself with a towel and paying extra attention to his penis and it becomes erect, this does not bother so he drops the towel and wanders through the house naked and still with an erection. The grand-daughter sees this and looks anxious and yells