I also have a musk turtle, but you are going to have a hard time buying one as it is illegal to sell turtles that are under 4 or 5 inches. (in the USA) This is to discourage the sale of baby turtles as they carry more risk of salmonella. Musk turtle owners argue against this as they only get that big. (I saved mine off a busy road in Arkansas) With all that being said, they are good enjoyable pets, but I don't recommend them for kids. One reason is the risk of salmonella and kids putting their hands in the tank and then not washing (lol my sister says she is like having raw chicken in a tank. She is not that bad, but I do wash my hands really really well after touching her tank) Second reason I don't recommend them to kids is that they bite. Not sure about red ear slider turtles (most commonly found in pet stores here in the USA and most likely from a breeder), but Timmy was a wild animal even though I have had her 3 years and is not aggressive, but will totally bite you if you put your fingers with in reach. I have never been bitten, but I know that if she did it would be a doctors visit because of how dirty her mouth is and how strong her jaw probably is. She is very happy not being messed with much, and kids just want to play. If you still do want to get one the biggest recommendation I can give is to put a much bigger filter on the tank. I went through 3 filters in only 6 months to learn this. She I is in a 20 gallon breeder tank (meaning it's longer and not as tall as regular) and I only fill it a bit more than half way (sounds weird but even though she is fully aquatic, she is not that great of a swimmer. She keeps to the bottom unless she is basking or getting air) So even though I only fill it no more than 15 gallons, she has a 55 gallon under tank filter. She is dirty and makes a mess when eating, the big filter also means I don't have to change her water as often and made her go from high maintenance to very low. I also found throwing 3 feeder fish in there help clean up after her. I don't even have to feed the fish, they live 6 months with just eating her food and algae. (she usually eats them after that.) Though if it is a new tank I would feed them as there is not much food in the beginning. Hope this helps. She is one of my favorite pets, super sweet and responsive to me, fun to watch. I love her .