You have many ideas to customize your own protective case for iPhone 5/5s, but if you like pixel art, the Fuse Bead iPhone 5s case may be a better creative kit.
The Fuse Bead is a pretty cool, fuse bead inspired protective case designed for iPhone 5/5s. The iPhone 5 case comes with a creative kit that contains 1000 fuse beads in 16 colors, one peg board, and three interchangeable fuse bead frames. Using these fuse beads and tools plus their web app, you can easily create your own pixel art, and attaching it to their included two-piece protective case in order to express your favorite pop culture on the back of your iPhone. Moreover, the iPhone 5s case is precision molded from robust engineering grade ABS/PC to protect your iPhone 5/5s from bumps and scratches, and its luxurious soft touch finish provides a comfortable and secure grip experience.
The team of the Fuse Bead iPhone 5s case is raising fund via Kickstarter. Pledging $34 will let you the protective case along with a fuse bead creative kit. If you like the design, jump to Kickstarter official site for full description or have a look at the following demo video first.