Methods/steps:

1, first draw a puppy, a little girl with a double ponytail and a big dog on paper in turn.

Draw a big cake, a small cake and some apples and bananas in front of a man and two dogs.

Draw a banner and a little star on their heads, and write the English letter "Happy Birthday" on the banner.

4. Use vermilion watercolor to paint banners, little girls' hair ropes and clothes, strawberries and apples on the table, and use lemon yellow watercolor to paint other places that need to be colored.

5. Watercolor their tops with roses, the hair of the first puppy and little girl with ochre watercolor and brown watercolor, and the table with ochre+white watercolor.

6. Finally, paint the little girl's skin color with vermilion+white watercolor, and paint the cake with vermilion+orange+white watercolor, and the birthday party will be completed.