This is affordable and works!
Although I don't recommend these personally because I don't like the weight mid foot when turning... but LOTS of people love it. So if you want one.. this is fab.
I know there are many children that want to practice at home and this is perfect as the balance is better supported for exercises and the material is good quality, especially for the price.
This is not recommend
to teachers for their studios. There are better ones but expensive, alternatively you can attach barres to the wall which is a lot cheaper.
These are effective and every teacher wants a Childs foot strong and stretched... Did you notice I said STRONG first. All stretching aids are great but they need to be done with the strengthening exercises too (your teacher will show you)
This has been recommended due to its value and does the job.