I do not have children. As a child, my parents gave me $5.00 a week with a few extras flown in for things such as magazines and movies. As a teenagers, I received $10.00 weekly and my father regularly give me $20.00 every Friday. That was back in the 1960s and 1970s.
At 18, I had a summer job against my father's wishes. I wanted my own money and be independent. It was a learning experience and an exhilaration. I was told that I was the best employee there as the other children HAD to work, thus were less enthusiastic.
If I had a child, the allowance would be about $15.00 weekly for an elementary school child. However, in high school, the child's allowance would be $50.00 weekly with some extras flown in for things such as movies, shopping, and a restaurant. Although I would grant these things, I would teach him/her the value of hard work through entrepeneurship. He/she can earn monies through the internet or by inventing somthing. He/she would not be idle.