Alexa will make a series of animal sounds and your kid will have to say what animal it is. There are only 2 attempts per animal in order to not frustrate them. If they get it wrong twice Alexa will also say which animal it is. Most animals also have hints if you get them wrong.
If you want more animals or have suggestions for improvement feel free to write them down on the US product page (I can't comment on the other locales, sorry).