Do you actually know what a hippo sounds like? And what noise does a seal make? Or would you just like to listen to the sound of a lion? Then this skill is exactly what you need. You can tell Animalsound which animal you would like to hear by e.g. saying "What sound does a hippo make?" or "Play me the sound of a lion". It also asks you if you want to hear some information about the specific animal you were listening to. If you say "yes", the skill tells you a random fact about the animal. If you do not want to be asked each time, you can change it in the settings of the skill by e.g. saying "Change the settings to 'voice only'". To change back you just have to say for example "Set settings to "voice and information" again. You can also ask for information about a specific animal first. In this case, Animalsound asks you if you want to listen to the sound of the animal after reading a random fact about it to you. If you are not completely sure what exactly you should ask the skill you can always call for help and the skill will give you some example-sentences. Animalsound is a perfect skill to learn something about different animals and for having some fun at the same time. Try it out yourself!
Main References for random facts: "http://www.sciencekids.co.nz/sciencefacts/animals.html" and "http://www.softschools.com/facts/animals"