Niamh had a friend stay over last night. At one point during the evening, in between computer games and movies and popcorn, the three of them disappeared upstairs for a while. They were very quiet.
The next thing I know they burst into my office growling and hissing and looking like this:
I thought it was quite an impressive job!
If you prefer your conclusions as a mathematical equation:
unattended_8_years_olds + make_up = zombies for all known values of unattended_8_year_olds.