For consistency, the Sci-Fri team made the changes to contrasting cases interface as shown in Fig. 2, i.e., replacing monolithic single block towers with tower constructed from multiple blocks. The team them tested the work too look toward educational effectiveness in the spring of 2012. A test with six 6-7 year olds began with six contrasting cases, then a mix of tower construction and tower block removal levels (up to 33 levels, up to 30 minutes of play time), then once either the time limit or all levels were reached a final set of six different tower pair contrasting cases. The result shown in Fig. 5 students scored 42% on the pre-test and 67% on the post-test. This difference suggests that the game produced substantial learning. We believe it to be unlikely, but we cannot exclude the possibility that differences in the pre- and post-test forms produced or contributed to this difference. Hence, we will follow up with more formal testing with many more subjects.