Kids in the age of 3 to 12. Their middle and upper-class parents. Parents are well educated because these lego toys develop many qualities in kids, such as logic, creativity, and diligence.
Type of ad:
More visual that combinational, but the words still play a role, because they imply to parent's feelings of pride.
How change:
I guess If I wanted to sell it to older kids, I would show more complicates figures that you can build and older kids(more like a boy in the picture on the left). For babies I would use brighter colors and easier figures.