Aww, what a sweet and whimsical piece. The simplicity of this watercolour painting really adds to a lighthearted feel that kind of gives the sense of childlike innocence. That sure looks like one happy dragon who's got an admirable rainbow-like array of ornate scales. I enjoy its unicorn rider, which gives the image an extra sense of joyous otherworldliness - an equine rider is something one would only expect in the outskirts of imagination. Also, cute dog, it reminds me a lot of Dug from Up.