yes i am an adult. so it's a weensy bit tight on me (surprised right. lol) but i didn't have the money on hand for the nearly $100 one that's out there and there are a few things i Needed something like this for. (won't bore you with details other than to say i have older cats and also some issues of my own i want to keep on top of)
for what i paid, i got better than i honestly expected from a "kid's toy". sure it's not professional grade but i can hear what i need to pretty easy. i was able to tell one of my "girls" needed to go to the vet for a watery sound in her left lung with no trouble. (by the way, thank you to the seller for that... she's my oldest cat and it may have just saved her life!)
now i will not tell you that this should be used Instead of a doctor visit or even a "real" stethoscope. but it's a good and useful product and works. not perfectly, but pretty good for what you pay. so yes, i say get this for your little ones. not only is it the perfect gift for your doctors/nurses-to-be but it will help make actual visits less scary for them as well having had some personal hands on experience with some of the tools they'll encounter.