Adventures in Dreamland

I'm traveling around with the Doctor. I remember him helping Roosevelt by telling him not to do something, then he meets up with him again when he's old and they reminisce. There's this kid that's been traveling with us. Instead of going to school like normal, he's been traveling around time and space. We talk to his mom about it, and we tell her that he's gonna need to stop.

We walk outside of this convenience store, and I see something weird flying in the air. I point it out to the Doctor and ask what it is.

"That's a pterodactyl."

"Yes, but why is it here?"

"Oh."

He tells me to go back in the convenience store and grab the cardboard box (which we apparently used to make a door into the TARDIS). I dropped the part that had the special symbol written on it (which looked like a really crappy bold-faced の) but I picked it up again. I left a bunch of the boxes we stacked around the door. I see a blue T-Rex with a tadpole tail sticking out of the back of its head and ask the Doctor what it is.

"Oh, that? That's just a...Tadpole T-Rex...
Yeah, we should get going"

"Yeah..."

When we climb in, the TARDIS is really tiny and we ask the Doctor what's wrong. He says that the amount of boxes around the door increases the size. He says his normally uses a very compact version because it uses less energy.