Independence could see Scottish parents benefit from a European style system of childcare with a far greater level of public subsidy, the country's First Minister said.
Alex Salmond said a "transformational shift" in this area should be one of the first acts of an independent Scotland.
He made the policy commitment as he delivered his key note speech to the Scottish National Party (SNP) spring conference in Inverness.
Mr Salmond hailed the measure as one of the reasons for voting to leave the UK in next year's referendum, describing it as "part of the why of independence".
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The Foreign Secretary was unable to rule out the possibility of continuing to pay money into the EU when he spoke to Peston On Sunday.
He told Peston on Sunday: "The country is crying out for leadership from the Prime Minister. We want to know her vision."
All the profits from the sale of each download of the forthcoming single would go to Shooting Star Chase and Together for Short Lives.