Do I need to purchase flight rewards for infants?

To enjoy reward flights with your family, you only need to spend 10% of the Miles value of an adult reward ticket for infants below two years. Please note that infant reward tickets are only eligible for use in Economy Class.

Upgrade rewards with Skywards Miles for infants are permissible from Economy Class to Business Class and Business Class to First Class.

Related questions

I have enough Skywards Miles – why can’t I upgrade online?
If there are multiple passengers on my booking can I just upgrade myself?
Why can't I upgrade with Miles in advance for certain flights?