Felix has developed an interest in numbers. Here, he is selling beads from his jewelry donkey. These days, we often hear him musing "5 is 3 and 2, but 5 is also 2 and 2 and 1", or something in that vein, while intently observing his fingers.
He's also been playing board games. In the last two weeks we started playing Connect Four, checkers and a really cool super tic-tac-toe game called Gobblet.