Giant amigurumi tardigrade (water bear) plushie/pillow made from 1 skein of Bernat Blanket yarn, plus scraps in another color

The Klein bottle is a non-orientable mathematical surface formed by twisting a tube and attaching its two ends together. Like a Mobius strip, it is one-sided, and if you traveled along its surface you’d end up at the same point you started at but flipped upside-down. Here’s the wikipedia page (and a more readable introduction to the Kein bottle...