Gift problems.

There is a problem nowadays with modern children to choose a gift for a birthday. Every year our son celebrates his birthday with his friends and his friends in their turn invite our son to their birthday parties.
We are the first ones in the birthday queue if counting since the starting of the school year and the first problem despite a place for a birthday party is when the parents of our son's friends ask what to gift him. It is very hard to think up a gift because he has almost all. After all, a gift hasn't to be too expensive, and also it will be good if a gift would be useful and interesting.
Further, we find ourselves in the skin of these parents and we need to imagine what to gift the next child who will have a birthday. And we want to gift something interesting, useful and not too expensive because to gift something just anything is a bad idea, I guess.
And I've forgotten about parents' gifts for our son as well. Then we have to think up what to gift our son, at least, on his birthday and on New Year, although there are many other gifting cases in each year.
However, all these issues are nothing matters, when we see how our son is happy with his gifts.