Too Many options for Pokémon Trading Card Game - Tell me what I should buy

JerseyFrank thought this was worth mentioning said
3

I'm about to go down this road with my son. He's into the old cartoons (thanks Netflix), and some of the not-so-old cartoons. Are the classic set of Pokémon in the newest version of the card game? I don't want to drop $100 on cards that will be abused and eventually thrown out if he's going to hate them from the jump.

  1. Gotta have the original 1996-ish Pokemon
  2. Gotta have enough cards so that 2 players can build a deck and play (nothing highly competitive, no league play... just father & son)
  3. We will not care for the cards. They will be thrown in a box, abused, stepped on, dipped in soft drinks, and be otherwise desecrated and destroyed.

What should I buy?