Nice one of the type "puzzle to be solved". It nicely teach to learn thinking before to start pushing :) "elementary" my nuts. On a bad day this would have taken me four times as long to see. Good level Was trickier than I expected! Somehow not easy to see how to do it in 28. :)) I guess many options blur the ''decision making process''. :) Kindergarten levels are built different nowadays Finally finished this series. These were a blast! Been a while since I had so much fun!