I'm so sorry Whenwillitend. It is very sad that they did not keep you on. However, I hope you don't give up entirely. There are other Toys R Us stores. It sounds like you would get a good recommendation from the last store you worked in. This could give you an edge somewhere else.
Who knows why they didn't keep you on? Maybe some of the other people were temps before? We could speculate all sorts of reasons but what we do know is that YOU were a great employee and they really liked you. Try to continue to seek employment in your field, this is just a bump in the road. O.K. maybe a BIG bump (it will take a little longer to get over). I wish you the best.