ryanair - checked baggage allowance

From ryan air confirmation email ‘The checked baggage allowance is 15kg per person (no infant allowance). No pooling/sharing of baggage allowances is permitted, even for passengers travelling together on the same reservation.’

We are travelling tomorrow with 2 kids as a party of 4. Am I correct in saying we can only check in 4 bags of 15kg as opposes to lets say 2 bags of 30kg? Even as a family?

Thanks