In this step, I drew a cube by pen tool. then, I colored it by gardient in radial type.Also I drew a heart and put it in front of the cube.Then I drew a flower by pen tool and colored it by gardient as well. As you see,I have added two images, because, I wanted to show that I have colored some of the cubes in the picture by linear type.I have put a lot of cubes as well as baloons in this picture.

At last, I took a picture from internet and drew a ballon by pentool.Then I colored it by gardient.as you see in the picture, I colored the ballon by linear type and choose 60 grade for that.Then, I drew three shadows by pen tool and put it inside the ballon and colored it by a light purple. I wrote a Happy Birthday among them by T tool and colored it by black.

And this is the final text of birthday card.

This is my final work of birthday card.

I have taken my idea from these two pictures for making birthday cakes and candles.

I have taken my Idea from this hats.I choose hats, because it is one of the objects in birthdays especially children birthdays.Then, I changed it to a human that give a gift.

It is funny to know a little about the history of birthday:

It is thought the large-scale celebration of birthdays in Europe began with the non-Christian cult of Mithras, which originated in Persia(Persia is curently IRAN), and was spread by soldiers throughout the Roman Empire. Such celebrations were uncommon previously so practices from other contexts such as the Saturnalia were adapted for birthdays.

Because many Roman soldiers took to Mithraism, it was distributed widely and its influence was spread throughout the empire until it was supplanted by Chiristianity.

"Taken from WIKIPEDIA Website."