Shri Ganesh ManasPooja is in Sanskrit. Manas Pooja means the pooja performed in the mind. We have to sit in calm and quietly and perform it. See God Ganesha on screen of your mind. Now offer whatever best you can to the God. Costly Ornaments, Vastra, flowers, garlands, Sweets, everything you have to see in your mind and assume that you are giving it to God Ganesha. Your honest feeling is enough. You don't have to purchase anything. We have to visualize that everything best we are giving to god. Please have an experience and see that all your good wishes are fulfilled by the blessings of God Ganesha.
Shri Ganesh ManasPooja