In the original activity, a balance and some weights are provided, and player arranges the weights in order of weight.. In the HPU version, one human pictogram is worth one weight. Player writes a comparative sign (like a number or a friend’s family name) on the chest area of a human pictogram. Figure 1 on the left is the initial state (Japanese family name is written on one’s chest). Figure 1 on the right is the final state, where human pictograms are arranged in alphabetical order.
Figure 1. Activity example of sorting algorithm