Get some foam, glue it together. 
Find some tape, plastic or leather. 
Put it all in a frame.
 Add some lights, give it a name. 
Wait wait wait, check the clearance. 
Looks good, lets call it Constructive Interference

Enter where it glows and its tall...

eat a mushroom, shrink real small.

The lights go out as you climb down...

SHHHHH! can you hear that sound??

Is there something burred in the wall?

oh, pretty; a floating ball