Alright, so here's a step by step guide on how I to built the thingie.

What I used were a pair of scissors, a box cutter, tweezers and some liquid glue and a toothpick.

The paper I used to print this is called cardstock, I think? It's a little bit sturdier than regular paper but you can print it on regular paper as well if you wish, although the antenna might become a bit of a problem if u do.

Okay, so first thing is you wanna cut everything out of the sheet, it's just two pieces, so it should look like this:

Before bending anything you may wanna cut the little line on the top, you can do this step later on but it can become a bit troublesome so I just rather doing it right now, I did it using the box cutter for an easier time:

Then you can start bending everything inwards like your average paper dice, do it with all faces, as well as all tabs, I used the tweezers for this step, very helpful, should end up looking something like this:

Then, before u start gluing anything on the main body we go to do the antenna, it has a black line where the antenna mirrors which is a bit hard to see cuz the printer I used sucks, but it is there, it's a guide line to bend everything in, kinda like a book:

Once you have it like that you can glue it together, except for the little white tab at the end, that part you just wanna leave it like that for now:

Now that you have the antenna all set up you can insert it through the little cut on top that we made earlier, the white part should go all the way in.

Remember, the side with the white shine is the front part!

Once in, then you can spread the tabs away from each other:

With that done, now you can glue the tabs to the inside of the top part:

Now you can start to close everything shut, I don't really have a detailed explanation of this step, I just started closing the sides first and then I just did the rest however I could.

The toothpick was very helpful for this step since I didn't wanna pour glue on everything, so instead, you can just pour a bit of glue on the side and then use the tooth pick to careful spread it across the tabs, you can use a cotton swab as well for that.

But anyway, once you somehow managed to put it all together then, presto! It's done:

Forgot something, you may wanna bend the antenna a little bit forward, to give it that curvey goodness:

Hope you find this guide at least a bit helpful, I didn't think it through too much. (⁠´⁠ ⁠.⁠ ⁠.̫⁠ ⁠.⁠ ⁠`⁠)