In Seasons 2, 3, and 4, Dora used a yellow helmet. She used it in León, the Circus Lion, Rescue, Rescue, Rescue!, Daisy, La Quinceañera, Super Spies 2: The Swiping Machine, Dora's Dance to the Rescue, Save Diego!, and Baby Jaguar's Roar.
In Season 3, Diego used a light blue helmet in Job Day. In Go, Diego, Go!, he used new version of light blue helmet in Diego Saves the Mommy and Baby Sloth.
In Season 1 on Go, Diego, Go!, Diego used a blue helmet in Pepito's Penguin School and A Booboo on the Pygmy Marmoset.