Think about including physical items by organizing crafting events. Everyone starts with the same supplies or has to find them in their homes. Creating the same thing that then is unique to each person is quite something and you can SEE creativity (and everyone feels accomplished.)
Your group size suggestion is great. You want to avoid the Ringelmann effect "in which big groups can become less productive because people tend to feel less committed to an outcome."
And you're challenged by "Social Cooling"(Dutch technologist Tijmen Schep says that a big-data society can chill our personal relationships because we’re being watched all the time.)
Your group size suggestion is great. You want to avoid the Ringelmann effect "in which big groups can become less productive because people tend to feel less committed to an outcome."
And you're challenged by "Social Cooling"(Dutch technologist Tijmen Schep says that a big-data society can chill our personal relationships because we’re being watched all the time.)