Currently paying $10 p/month for kids phones to Spintel for 1GB month.
They have been so good with this the minister for communications and finance has approved a modest increase to the budget (15.00… it IS a 50% Increase!).
I am not sure whether to go TPG month to month or a 12 month SIM with 'x' amount of data included.
Kids tell me 5GB per month would be ample. I would love to get them on Telstra network (asking for too much here? not sure).
Recommendations would be very much appreciated.
Boost 12-Month 140GB for $170 ($35 cashrewards cashback): https://www.ozbargain.com.au/node/725596
It falls within all of your requirements (including Telstra network)