Stroller canopy

Whatever your stroller is, you need one of those. I like this one by Protect-a-bub, an Australian brand:

Sunglasses

Max got great Banz sunglasses, but I wish I had gotten those really cool ones instead.

Sunscreen

Supernanny has asked me to check that Max's sunglasses protected both against UVA and UVB. And yesterday she gave me an article that recommended to make sure the sunscreen contained zinc and titanium. Turns out there is a sunscreen controversy about chemical-based sunscreens, which would be photocarcinogic of all things. This being America, there is already lawsuits brewing.
For info about the risks associated with beauty products, see the Environmental Working Group website.