"And the earth- We have spread it out, and set thereon mountains standing firm, and produced therein every kind of beautiful growth (in pairs)" - Quran 50:7 (read more)

"Narrated Anas bin Malik: While we were sitting with the Prophet in the mosque, a man came riding on a camel. He made his camel kneel down in the mosque, tied its foreleg and then said: "Who amongst you is Muhammad?" At that time the Prophet was sitting amongst us (his companions) leaning on his arm. We replied, "This white man reclining on his arm." They then addressed him" - Sahih Bukhari 1:3:63 (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