What is doubling?

Captain Mahari: Right cadets, who's ready for an adventure?

Sai & Anya: We are.

Sophie & Fin: Us too.

Captain Mahari: Okay, great. That means we will need twice as many spacesuits for you. Or double the number of spacesuits.

Double two makes four. Let's go. Here is the mathematical marvel known as the amazing doubling waterfall.

Fin: Why is it called that?

Captain Mahari: Because whatever you put underneath it, will double.

Fin: Laika, be careful. Oh two Laikas.

Anya: So double one must equal two.

Captain Mahari: Correct Anya. Let's try some more objects.

Sophie: What if I throw in these three rocks? Ah three more.

Sai: Double three equals six.

Captain Mahari: Correct.

Fin: And if I throw in my homework books,

Sai: Double the amount of homework.

Fin: Whoops! Double two makes four.