Survey sites for kids?

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Hey so I did come across a survey site for kids a few years ago but I forgot the name. Now I want to get my brother to start doing surveys as well so he can start earning some money are start being responsible. So does any one know or has heard of any sites that are dedicated to kids, whether they can take surveys and earn money or prizes? I haven't come across many but I know that there is at least one out there.