Episode 1
Colors
"Ro" bullies the other kana, but is stopped by "Do."
Introduces: i ro ha ni ho he to chi ri nu ru wo.
Episode 2
Who lasts?
Cats are bothered by dogs and a nose, then there's a jitterbug.
Introduces wa ka yo ta re so tsu ne na ra mu n.
Episode 3
Snakes and Mountains
Two battles, and a rescue.
Introduces Wi u no o ku ya ma, ke fu ko e te.
Episode 4
Clowns and Cops
With clowning, fishing, and vacuuming, the epic saga concludes.
Includes the complete "iro ha" poem, and the complete list of hiragana.