Relating to my previous post - Jaideep and I have been playing Monopoly with our daughter on Sundays. Before the start of each game, we decide on 'house rules', i.e. rules that we apply to our game that is not necessarily in the rule book. For example, if you land on GO, as per the house rule, you get 2x the amount of money compared to what you get if you pass GO. After she had played the game 3-4 times, we allowed her to define her own house rules. While some of her rules may have seemed bizarre, it created a new sense of excitement for her while playing the game every Sunday. She recalled some of the rules on subsequent weekends, and even discarded some rules she had defined in her next game. This has increased her creative thinking and reasoning skills.
Thinking out of the box can happen in many ways. Hope you can share some instances with us.