As mentioned, we do have the child fitness tax credit.
Following up on what Dr. Clark said, it's important to note too--and I didn't include this in my presentation--that the federal government does provide a child tax benefit that provides low- and modest-income families a fair degree of income support as a refundable tax credit. It provides up to, I think, around $3,400 per family for families with incomes less than around $27,000 per year. So that's substantial income support that would help towards healthier food choices.
I'll let Alex or Geoff speak to the other half of your question, if they want to.