We love Little Nutty helmets from Nutcase. They're adjustable, they have lots of great graphics to choose from, and, most importantly, they protect your child's head. And now they've added two great new looks to their line of helmets: Birds & Bees and Rockets. You can start your child in a Little Nutty around 18 months but has to have a minimum of 18" head circumference. And since the helmet is adjustable, they can wear it until roughly 5 years old. We think it's a great investment.