"Glory to Allah, Who created in pairs all things that the earth produces, as well as their own (human) kind and (other) things of which they have no knowledge." - Quran 36:36 (read more)

"O Allah's Apostle! We asked you for mounts, but you took an oath that you would not give us any mounts; we think that you have forgotten your oath.' He said, 'It is Allah Who has given you mounts. By Allah, and Allah willing, if I take an oath and later find something else better than that. then I do what is better and expiate my oath.'" - Sahih Bukhari 7:67:427 (read more)

"...resembling animals is not something appropriate for the Muslim to do, because it is humiliating a soul that Allah has honoured with reason, and resembling animals is not mentioned in the Qur’aan or Sunnah except in the context of blame. If the [child's] costume of this animal is three-dimensional, it is not permissible because it comes under the heading of making images, which is forbidden in the texts. As for costumes resembling inanimate objects, there is nothing wrong with wearing them and using them." - Shaykh Dr. Ahmad ibn Muhammad al-Khudayri