One sees a tree with an apple in it. Hungry, she attempts to get it, but she can't reach it. Two comes along, sharing her plight. Then, Three comes along, and easily gets the apples. She challenges One and Two to three rounds.
The first game consists of the apples being put in three cups; putting the apple in the yellow cup, Three easily wins as the Numberblocks assume that the apple is in the cup corresponding to their colour and number. Three eats the first apple.
The next game consists of balancing an apple on a Numberblock's head; One starts, and is overtaken by Two, who soon is overtaken by Three. Once again, Three wins.
The last game consists of who can make the best surprise. One and Two soon have the plan of both adding up into Three and sneaking up on Three, before surprising her, as she becomes One and Two. Despite this, Three still ends up winning since she was the one who surprised "herself". Eventually, feeling sorry, she decides to lead the Numberblocks to more apples, giving them all apples. Two lends her his second apple.
This is the first episode where Numberblocks demonstrate that they can move their parts except their blocks outside of rearranging. Such a trait isn't touched on a lot until the later episodes.
It's demonstrated that consciousness can be transferred between Numberblocks. This is evident during the last game.