Mario Kart 8 Deluxe Switch Download [WORK]

hi can anyone help me? i just bought the mario kart 8 game and wanted to ask how many joycon controllers do you need in order for two people two play on the same switch? my niece and nephew both want to play but im having issues on how many of the joycons are needed for both to play together? does each person need two joycons or only one?

Mario Kart 8 Deluxe Switch Download