You can teach them Yugioh this way:
Begin with only no effect monsters only attack position → Bigger number wins
Add defense position
Add tribute monsters
Add effect monsters
Add normal spells
Add normal traps
Add complicated spells and traps
Introduce weird summoning mechanics
(Maybe) Introduce crazy infinite combos
You can teach them Yugioh this way:
Begin with only no effect monsters only attack position → Bigger number wins
Add defense position
Add tribute monsters
Add effect monsters
Add normal spells
Add normal traps
Add complicated spells and traps
Introduce weird summoning mechanics
(Maybe) Introduce crazy infinite combos