What games can be played in first grade primary school mathematics classroom?

Play "Finger Touch"

How to play: As in 1, two children stretch out their hands. The first child touches the other child's finger, 1+1=2, so the hand touched by the first child only stretches two hands. Same as the other kid. Put one hand to touch the first child's hand, for example, touch two, 2+1=3, so one becomes three. Continue like this. If something like 9+5=14 appears, stretch the position 4. If 3+7=10 appears and you cannot extend 0, hide that hand behind your back to prove that hand wins, and play the game with one hand. If a child reaches both hands behind his back, it proves that he has won.