The past week has been about everything binomial and trinomial. These are two of Me Too's favorite works.
Kal-El's progression through the sensorial materials was basically halted during the 12 months it took to sell our house, move, and set up our materials again. Additionally, Me Too has always been much more interested in and adept in this area. This means that both boys are in relatively the same place in the sequence. Their approaches are from two entirely different places. Me Too is very challenged by these works, spends a long time with the materials, and repeats them frequently. Kal-El does not find these works to be too easy by any means. However, he has a larger mental toolbox to draw from and solves the problems more efficiently.
Kal-El has always refused presentations on the trinomial cube. Today I asked him to show me how to do the binomial because it was something he explored before the move. I felt a review of the binomial would make the trinomial easier and didn't have ANY idea whether he remembered how to complete it.
Because Me Too thinks this is "HIS special work" he kept a close eye on Kal-El's progress. In fact, if he came any closer his eye would be ON the cube. He was a great little cheerleader though.
Kal-El then admitted that he was "scared" of the trinomial cube. I told him that it is a cube made out of little blocks, not a monster or supervillian, and that we didn't need to be afraid of a bunch of blocks. His face lit up with a big grin and we were good to go.
I had him watch me build it inside the box. Then he built it himself twice. The tricky parts seem to be remembering to use the larger prisms toward the inside and the smaller toward the outside and, likewise, building a taller level on the bottom and the shortest level on the top. If you reverse any of the levels all of the sides don't match the picture on the lid. The work he has already done with the Decanomial Square/Pythagoras Square made this easy to correct.
Next, I built the cube outside its box and we checked all the interior and exterior faces. Kal-El finds this fascinating. He likes to try to trump me by finding a face I've missed. Finally, Kal-El rebuilt it inside its box and returned it to the shelf.
In other news, Me Too has STILL not tired of the cylinder blocks. I'm glad he is making sure we get our money's worth out of them.