Alphablock I recounts a tale of how she and her friends found treasure on Tall Tree Island. They had to reach a BIG tree that was far away, so they rode to it on a PIG. The pig was slow, so they made it BIG. Soon, it was hungry, so they fed it a FIG. But the fig was too small, so they made it BIG. Accidentally, they made the pig a WIG, which the pig did not like until they made it BIG. At the big tree, they started to DIG, but the spade was too small. When they made it BIG, it dug up a most unusual treasure. 
 

Alphablock U needs the other vowels' help to find the confidence to join in their acrobatic act. They offer him a crash MAT and a safety NET, but he's still uncertain. A special KIT to wear doesn't help, but when Alphablock O's suggestion of a HOP transforms U into a hopping bunny, he declares himself unstoppable. He overshoots his mark, but P is on hand to take him UP to his place at the top of the vowels' tower. In the grand finale, the vowels demonstrate all the things that vowels can do.