Can you fly the balloons all the way to the top of Seattle's Space Needle?
In every trial you will be given a number of which to start skip counting from by 3's.
Click the balloons with the correct numbers.
For example, if you are asked to "Count by 3's. Start from 12", then click the balloons with the numbers: 15, 18, 21 and 24.
With every successful click, the balloons will rise up into the air.