And yet, much money is spent marketing things to children. What a waste this must be!

> Likewise, kids always wanted what they seen adults to have (phones).

While a mobile phone may be a simple and useful (even vital) tool, huge amounts of money is spent on marketing to drive desires for particular brands, or new models/features. This influences adults, and also probably children in turn.

> If they seen it in their friends house, they found it fun.

So where did those kids discover or get the desire for the item? And/or where did their parents get the idea to buy it for them? Why (e.g.) Playstation rather than Nintendo, or vice versa? At some point, it likely tracks back to marketing, creating the desire.