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I agree with you, nowadays children are introduced to online gambling through such attractive advertisements. Due to the ease of gambling, children can easily access these casinos. And children are easily attracted to online casinos, and become addicted. Therefore, if parents are giving a device to their children, the parents should limit there children's internet usage. And keep an eye on every activity of internet usage. Overall, All parents must be extremely aware and it is important to monitor the online activities of their children.
Of course, it is very difficult to prevent underage children from getting involved in online gambling if parents do not really supervise them well. There are many advertisements of various types of online casinos that are posted several times on social media, embedded in short videos by influencers. I know social media advertising is the best market for attention and this cannot be avoided, so parent should know how to best monitor their children if they care. There are parental settings on some platforms, they need to prevent many things through those features.
Modern developments cannot be avoided, so parents need full awareness so that they can direct their underage children so they don't go down the wrong path. They are still in the learning stage and it is absolutely bad if they are addicted to gambling, but it cannot be denied that now there are many minors who are addicted to gambling in every country.