Hi,
[...] It is built so that the four front tentacles are movable. The octopus is going to be made for the eyes and arms to be watching/moving.
So, some of it is built already?
The arms try to touch the figure in front of them and when the person puts their hand on the tip of the octopi arms the tips light up.
Not really clear how much is made and what's missing??
Now am I thinking something that is too complex or cannot be programmed? I could upload a sketch of my idea, if you do believe it could work.
Well, we don't know the first thing about your mechanical, electronics or programming skills, so it's impossible to say.
Anything can be made, programmed and wired, but how should we be able to judge whether you have what it takes to do it?