Activitiy 1 - Pi tangram
Activity 2 - Pi art
Activity 3 - Pi skyscraper
Activity 4 - Pie
Activity 5 - Pi snakes
"PI snakes" can easily be created with regular squares (easier in a coordinate system that is hided at the end - a little more demanding without using it).
Activity 6 - Einstain's riddle
English version
Hrvatska verzija
Activity 7 - Pi puzzle
Compose the puzzle to get the number pi in the circle.