I have been thinking of what could be into a chameleon circuit that is in normal minecraft? so i thought

• 1. Crafting Table
• 2. Furnace
• 3. chest
• 4. a Dalek?
• 5. houses that can be walked into
• 6.  beds?

Well that's all the ideas i got right now

An Laser Beam ? a working "beacon" that when you get in the light it will teleport you onto the TARDIS Dim . When is dematerializing the Light starts turning off slowly .

 Interesting Idea there

How about a cactus? Then you can hide in the desert, you would get in by running into it. When you dematerialize the cactus goes from 3 blocks tall to 2 then 1 and then disappears.

 The overall efect of the demat is nice but that wouldnt fit in with the tardis. Because no matter what is the tardis exterior the demat will be the same.

 But i like the idea.

I was thinking a door exterior that can easily blend in in a house, building, etc.

 I'll expand on this idea here, Maybe the House is the Tardis and there are controls to make the house turn back into a regular Capsule, you know on the console, and maybe you can make your own Chameleon Circuit disguise into what ever you want, maybe a house, model or what ever! Very Nice idea there

A Cardboard Box.