This Madpax Spike Backpack is currently on Lightning Deal at Amazon for just $20.68 (instead of $60) and I know it’s weird and impractical, but I love it anyway.
There’s some kid out there who really wants to be a dinosaur or a mutant turtle who would love this, I just know it.
(If I needed a backpack, I would totally buy such a thing. I mean, it makes a statement, no? That statement might be “I am a real live cactus, beware,” but whatever.)