When my son was about 9 or 10 years old, I took him and his friend to a local kids game store, where I gave each of them $5.  I was hoping $5 could last a few hours.  His friend changed his $5 bill into quarters and used them up in one sitting in less than 30 minutes. After that, he came to me asking for more.  My son changed one dollar for 4 quarters and used one quarter on some kind of gambling machine, where he inserted the coin and spinned, hoping it would bring back more coins.  After 30 minutes, he came to me with more than $5.

I would assume playing the gambling machine must seem more fun to my son than the pure game machine that his friend played.  At least I hoped he had a good time.  I was preoccupied with his noisy friend’s demand for more money and forgot to ask my son what he was thinking at that time.