从所给出的单词中选出合适的完成对话。

Mr. Li: Welcome to the Science Club. You can see many interesting here.

Students in our school make them.

Kitty: Amazing! I love this club!

Joe: What is this, Mr. Li?

Mr. Li: It's a . You can tell the time with it. You can also use it as a fan. Peter: That's cool! Who makes it?

Mr. Li: David does. He is a student in Grade Six.

Kitty: l want to invent myself, too. Peter: What are you going to invent?

Kitty: I'm going to invent a machine. People can print(打印) out anything with it.

Joe: I'm going to invent a coat. It can colours at any time. Mr. Li: wow! Sounds great! I hope you will be great inventors in the future!