During the Tuesday of Carnival, the ritual of the "Ch'alla" offers ritual tables to the gods.
The Ritual Table
During the carnival ch'alla, there is a ritual table prepared using "untu" or llama grease with candies and other bars which represent different goods a person can wish (house, money, trips, etc..) Usually they set these ritual tables with party decorations, butterflys, snakes, frogs and bread. All these go with beer and alcohol, each element has a meaning of its own, for example the butterfly is luck, the snake is money the bread so that food is enough. People move around the table walking on the "Pachamama" or mother earth and offering these things to her so that everything goes well in the coming year, so that luck is with them and no evil happens.
The Carnival Party
In the rural areas in the highlands, on Sunday they prepare the ritual table and ready it to be burned. On Monday they gather the extended family and all the animals are marked. Then they drink and do the Ch'alla where they share the drinks, foods and other goods with mother earth.
Tuesday of Ch´alla
Next comes the Tuesday of Carnival, where they go to the house of the jilaqata or community leader and they do the ritual of the ch'alla and they also "q'oar" or burn all these offerings together with special ones and then dance and drink.
Later on wednesday, thursday, friday and saturday they go through all the village, to the different public places and follow the rituals so that everything goes well during the year.
With respect to the question if the Pachamama or mother earth receives all these offerings many people say that it depends on their faith. In La Paz many people in the rural areas say that in Cochabamba people don't have as much faith in the Pachamam as in La Paz, but that it is growing nevertheless.
The last thing done is the burning of the ritual table, with offerings on it and pronouncing the names of the different gods. It is said if the table burns and leaves white ashes that the pachamama has received the offerings with satisfaction.