Thing 1:  "I really want you to help me with an invention I'm working on."

"Of course!  Are you still working on the pulley for your playhouse?"

Thing 1:  "Finished that up. Now, I want to build a laser that can light up the moon."

"Uhm, that might take more material than we have in the back yard."

Thing 1: "That's true.  We'll have to go inside, 'cause I'm thinking we make it out of cleaning products."