Teaching Veer in a Fun Way

Veer goes to school now. He is in Junior KG. However, upon his return from school, when I ask what he did in school, he normally responds saying "Bohut masti kiya".

Veer has developed a general tendency of irritating by asking same questions again and again. He is ignorant that we also enjoy it when he does so. Last night, I was telling my wife that my First Class train pass has expired, hence the next day I would have to travel in Second Class. Upon hearing it, Veer started with his questions.

Veer: Papa, what will you do if the Second Class pass expires?
Me: I will travel in Third Class.
Veer: How will you travel if your Third Class pass expires?
Me: In Fourth Class.
Veer: How will you travel if your Fourth Class pass expires?
Me: In Fifth Class.
Veer: How will you travel if your Fifth Class pass expires?
Me: In Sixth Class.
Veer: How will you travel if your Sixth Class pass expires?
Me: In Seventh Class.
Veer: How will you travel if your Seventh Class pass expires?
Me: In Eighth Class.
Veer: How will you travel if your Eighth Class pass expires?
Me: In Ninth Class.
Veer: How will you travel if your Ninth Class pass expires?
Me: In Tenth Class.
Veer: How will you travel if your Tenth Class pass expires?
Me: In Eleventh Class.
Veer: How will you travel if your Eleventh Class pass expires?
Me: In Twelfth Class.
Veer: How will you travel if your Twelfth Class pass expires?
Me: In Thirteenth Class.
Veer: How will you travel if your Thirteenth Class pass expires?
Me: In Fourteenth Class.
Veer: How will you travel if your Fourteenth Class pass expires?
Me: In Fifteenth Class.
Veer: How will you travel if your Fifteenth Class pass expires?
Me: In Sixteenth Class.
Veer: How will you travel if your Sixteenth Class pass expires?
Me: In Seventeenth Class.
Veer: I am done now.

I could never have made him go from "First" to "Sixteenth" in any other way.