Making spheres

so, here are the pictures of my spheres. I like the idea I had for the first one, but it was a serous pain to peel the layers of cardboard back for it. The second one was ok, but a lot smaller than I meant it to be since I was still pretty in experienced with cutting cardboard, which is not an easy thing to do. The third was...just a complete flop, was a bit last minute, since I couldn't think of anything else to do with it...

 Glue, internal

glue skin

no glue