To be frank, I didn’t have much more interesting on flexible keyboard before, but I have to say Bendi Board Flexible Keyboard is a interesting and funny keyboard.
It’s available in two types, depending on different patterns. Aliens is black with drawings of little white Martians scattered all over the keyboard. Punk is white with black and white drawings with different punk culture icons. Both are waterproof and resistant to acid and dust, and are made of silicone, a soft material that make you more comfortable than traditional keyword.
You can get it for $37.24 USD at Curiosite.