The 10 birds propose to work the complements to 10.

The child observes the number of birds in the lawn, and must indicate how many birds remained in the tree.
A hole operation is displayed in the center.

Game 1 (bird): unlimited time.
Game 2 (chat): about 6 seconds to answer.

To reset the scores, click 5 times on Serge the llama in the start menu.