"Jimmy Smith Has a Dinosaur" by Gregg Chamberlain appeared in Daily Science Fiction on March 14, 2013. "A little boy complains to his mother that, unlike he, his friend Jimmy gets to have and do all the cool stuff."
It is difficult to pull of a good piece of microflash. At about 120 words, Mr. Chamberlain has. The story is full of original, creative science fiction ideas, and the ending is simply delicious. 6 out of 7 rocket-dragons.