"Purple."

"And if you mix all the colors together, will you get a light color or a dark color?"

There is a small pause before one boy says, "Really dark!"

"Brown," some kids say, trying to shout over the ones who are saying "Black, black!"

Now comes the science--if the ink in each of the pens can be broken down to find out what colors make it up, the class can figure out who kidnaped Janet Jackson.

Each group gets a cup with a thin layer of acetone in it, along with a suspect, complete with pen.

Amy Chen, group five's suspect, warns the group not to smell the cup or touch the acetone.

Beau pinches his nose as the three girls in the group, Kathleen, Jenny and Iliana, gather around and make a dot on a slip of paper so the ink can bleed into its base colors.

The group begins to argue.

"They said not to put the dot in," Kathleen warns Iliana, who is carefully inserting the paper into the acetone.

Watermelon, who has been whispering with Beau for most of the class, asks, "Can I put on the tape?" but Jenny is already holding the cup for Kathleen, who carefully tapes it in.

Now the waiting begins, but between the heat in the room and five children between the age of seven and nine, it doesn't last long.

One of the girls picks up the cup to see if the ink has separated yet, and the rest of the group protests. After a bit more arguing, Beau notes that green has bled out. The group is excited, and eagerly waits for Villavicencio to come around with the original note to see which suspect did it.

When he arrives, they discuss their guesses in whispers. Most of the class eventually votes for Danielle, whom Villavicencio confirms is the guilty party.

"YES!" comes a voice from the back.