Yes, we started Shichida. I just did flashcards (among other games) recently with her. Intially she couldn't sit still and would run about. After the 5 minute suggestion every night and with the energy ball exercise, she can now take 100 cards in one sitting.
My! it was tedious doing the flashcards. I, together w hubby's help made, 200 pieces. I had to google search the pictures, then put them into template. Print picture on one side and words on the other. Cut them out and laminate them. Then decide which stack to put them together and alternate them every other day so that it isn't boring.

Believe in your child. They can do so much more than you imagined.