Congratulations on your first entry and welcome to DPC! Be careful, it can become addicting!
I really like the composition of this shot. I love that you placed the central pony on top of the others, making it stand out even more. There's a lot of talk about rule of thirds, but I think putting something in the dead center of a photo can often be just as interesting, and this photo proves that point.
As you heard from many other commenters, this photo is just way too small. I feel that whenever someone has a small photo, they're usually trying to hide something, such as poor focus or dust on the lens. The larger a photo is, the more confidence it seems to have, so don't be afraid to really utilize the maximum size allowed.
I love the colors in this photo, they make the whole frame very interesting to look at. Unfortunately, there seems to be a yellowish color cast caused from the tungsten lighting in your living room. Most cameras have a feature that can get rid of this, and Photoshop can also fix it. This, along with a slight increase in saturation and contrast, would have really made the colors jump out of the photo more.
I also really like the dark spots between the dolls. I'm not sure if this is a result of lighting or if they're sitting on a dark surface, but I think the deep shadows really make the photo more interesting and give it depth.
aww I love this image! Colorful and clear - great focus and composition. and it brings back My Little Pony memories when I was a kid. :) the only problem is that it's a little too small.
4 - Mainly for the potential. Colors are good and (from what I can discern) the focus & focal point is good too. Criticism; the size of this is the biggest negative. Needs to be 640 on either width or height, in this case width. I like the way you have set the middle unicorn facing up to the camera. A slightly different crop (carefully choosing what to 'cut out'), and the size, would have made this much better in my opinion.