GoodDogPlain by Ethan Dunham of Fonthead Design is a free cartoon brush display font with plump, uneven letters and a cheerful hand-drawn look. Its rounded strokes swell and taper in lively ways, with soft edges and irregular proportions throughout. The lettering looks loose and friendly.
Packaging is an especially good medium for this style, whether on snack labels, children's products, or casual cafe branding, because the letters resemble quick marker drawings. Posters and merchandise for family events or playful entertainment can use that same approachable, illustrated quality.