If you go into the Amazon Alexa App “Settings/Account Settings/History" and find the voice instruction you can report there that it was not what you wanted with a thumbs down and hopefully the matter will eventually get corrected by the Amazon folk, or sometimes creating an ‘Alexa routine’ to play the radio station from TuneIn may work too, but that’s usually the approach to take if the device regularly keeps mishearing your instruction.
I’ve just tried this with an ‘echo dot’ device and seem to get the same result, it too plays ‘Fun Kids Junior’.
I’ve done that, and hopefully Amazon will fix the problem soon.
Thank you
@Lanby - maybe TuneIn has changed something (Alexa uses TuneIn). This is what you get if you search TuneIn - it does seem a bit confused about the difference between Fun Kids and Fun Kids Junior.
https://tunein.com/search/?query=fun%20kids
After a bit of doing and frying with Tunein support asking the same questions three times and not reading my answers, it now works properly :)
Thanks @John B for your suggestion