Offering the mandala contains the practice of all six perfections. By cleaning and blessing the mandala base with liquid mixed with a bajung pill you practice the perfection of giving (water symbolizes prosperity). Checking the grain1 for insects and looking after the base, keeping it clean, leads to the perfection of moral conduct. Removing insects from the grain without harming them leads to the perfection of patience. Thinking of how fortunate you are to be able to practice Dharma and making the offering with joy, you cultivate joyous effort. By not forgetting the visualization, you attain concentration. By clearly visualizing the colors and objects in the mandala, and by meditating on its emptiness, wisdom is attained. Therefore offering mandalas helps you to quickly complete the two accumulations of the merits of method and wisdom as it contains all six perfections.