They're dice. They're companion cubes. The one is a heart. what more could you want?
I always wanted to do SOMETHING Portal-related. I wasn't really sure what but I knew it had to be lovable. This, of course, led to the terrifying realization that everything creative I've done recently could very easily classified as "cute". But I digress.
Each die is 2cm x 2cm x 2cm, printed in WSF. I may print some full-color ones at some point, or perhaps just paint them