“The Letter Factory” (2003) plot (edit it): One day, the Frog family visits the Letter Factory, where Mr. Frog works at. Mr. Frog is arranging a special presentation, with help from Mrs. Frog, Leap, and Lily, to convince the manager of the factory, Mr. Websley, to make a talking alphabet book.

Leap attempts to carry the letters E, F, G, and H, only for Lily to roll into him in a large letter O, knocking the letters everywhere. After the crash, Tad is bewildered to find out that there are so many letters in the alphabet. Leap politely explains to Tad that he's too little to learn his letters, but Tad mistakenly believes that Leap wants him to go away, so he decides to wander through the factory, leaving Leap and Lily to get the presentation ready while Mr. Frog gives Mr. Websley a tour of the factory.

While bemoaning about being too young to learn about the alphabet, he runs into one of the factory's employees, a fun-loving inventor named Professor Quigley, who cordially offers to help Tad learn his letters, by taking him through all 26 of the letter training rooms, one by one.

The A room features the A letters getting scared by a monster. The B room resembles an orchestra classroom or a chorus classroom with the B conductor conducting Beethoven's Symphony No. 5. Suddenly, One of the B letters blows the tuba so hard it blows Tad, Professor Quigley and the B conductor out of the room. Tad and Professor Quigley land in the C room, where it's c-c-cold. Suddenly, a giant snowball comes, the C's jump out the way while Professor Quigley and Tad start running from the snowball and screaming as they get trapped in the snowball which then bursts out of the C room across the hall and finally crashes into the door to the D room causing it to fall apart. In the D room, the D class is playing jazz music, and the D trainer is playing a drum.

Leap directs the first four letters, A, B, C, and D, to make their sound. Then, when he turns on the spotlight, the letters A, B, C, and D are blinded and they end up bumping into each other.

Professor Quigley and Tad go to the E room, where an elderly E trainer says "eh" when he's trying to hear. Professor Quigley claps his hands, but then accidentally breaks the egg. Then he cleans his hands and he and Tad leave the E room. In the F room, the F letters flap their wings and fly to their sound. In the G room, the G letters say their sound as they lift dumbbells. The H room is tropical climate where the H letters say their sound.

Mr. Frog shows Mr. Websley a machine where he double checks all the letters. Berfter appears after the first 7 letters of the alphabet show up on the machine, which shocks him. Mr. Frog explains that the Berfter is why they double check all the letters. He cancels him out and calls a letter H at checkpoint 3.

Before entering the I room, Professor Quigley tries to ink the pen on the lowercase i, but then fails, until he splattered it on. Inside the I room, the I letters say their sound when they get squirted with green slime. The J room has the J letters saying their sound while jumping on trampolines. The K room has the K letters saying their sound while performing karate kicks. The L room features the L letters singing their sound while licking their lollipops to the tune of the Blue Danube Waltz.

Lily then gets the letters, I, J, K, and L to do dance moves.

In the M room, the M letters say their sound when they eat all kinds of food. Tad accidentally burps and says "Excuse me". Then, Professor Quigley and Tad try to go into the N room, but unfortunately, the N letters don't let any visitors in their room, so they boarded the door. Professor Quigley asks the N trainer if he would hear the sound, but the mean N trainer rudely says "No!" and slams the door for the first time. Quigley tries to enter, but the N trainer later tells them to go away even at noon, near nine o'clock, nor next November by saying "Nope?!", "Nuh uh!", and "NO, NO, NO! Not noon, not near nine o'clock, nor next November. Not now! Not ever. NEVER!". After the last door slam, Professor Quigley tells Tad that they may have to come back to the N room, until Tad tells Quigley that the N says "nnn". Then, that makes Professor Quigley happy and three N letters arrive and join them singing the N song in the hallway. Later in the O room, the O letters swing on the vine over a pond with an octopus and shout their sound like Tarzan. The P room features the P letters turning into popcorn when saying their sound.

Mrs. Frog plays the piano as the letters M, N, O, and P sing their sounds.

In the Q room, two guest speakers, Dicky Duck and Molly Mallard, have a quacking argument. The R room features a race track where the R letters race to their sound. The S room is a seminar-like class where Tad and the S letters are assembled for an assembly and the guest speaker snake hisses to the sound. In the T room, Professor Quigley and Tad, as fellows from the UK, watch the T letters toe-tap to their sound while drinking tea.

Leap and Lily pop out coughing when the big special effects smoke machine doesn't help the presentation. The letters Q, R, S, and T pop out of the smoke to sing their sounds. When Leap and Lily realize Mr. Frog told them they need to keep an eye on Tad, they start looking for him.

In the U room, the U letters say their sound as they go up and open up their umbrellas. The V room features the V letters vibrating to their sound. The W room has the W letters rap to their sound. In the X room, the X letters turn into X-rays and Professor Quigley and Tad can see their inside. The Y room has the Y letters practice cheerleading to their sound.

As Leap and Lily have run through the factory looking for Tad, but they can't find him, they are fearing about their dad getting worried.

Leap and Lily finally found Tad in the Z room sleeping with the Z's. They wake Tad up because of a big problem for the presentation.

During the presentation, Tad sings a song about the letters from A to Z. Finally, Mr. Frog and Mr. Websley thank Leap, Lily and Tad for the help. Then, Professor Quigley rewards Leap, Lily, and Tad with Alpha-Z shirts. Tad thanks Leap for the special presentation.

The scene irises out and the credits roll.