Etsy user Katy Creider has really gone above and beyond in creating these incredible personality core plush toys based on the ones from the climactic battle in Portal. Each of GlaDOS' cores are 26" in circumference and she currently has the above Curiousity Core and the Anger Core available for $45 or you can order a full set of spheres for $150.
What makes these toys so cool are the built-in voiceboxes which, when activated with a poke as seen in the above video, they repeat their lines from the game. The Anger Core is absolutely terrifying but I'm sorely tempted to pick up that adorable Curiosity one. The Intelligence Core also features a voice box, leaving the Morality Core as silent as the grave.
Damn neat stuff. You should check out some of Creider's other gaming toys over at her Etsy store as well. There's an amazing King of All Cosmos pillow that I'm drooling over and a bunch of other neat stuff.