The McDonald's Happy Meal toy 2021 Marvel's Eternals Thena is a collectible toy featuring a character from the Marvel superhero franchise. Produced by Marvel Toys in collaboration with McDonald's, this toy is part of the Eternals series and is aimed at children aged 4 to 16 years. Made in the United States, this toy carries a California Prop 65 Warning as a reminder to not eat it. It is a sought-after item for fans of Marvel superheroes and collectors alike.