If you thought Italy’s popular seaside locales were too fancy, too steep, and too crowded to bring the kids, we’re here to change that.

Clarke’s is the anti-museum museum—a gloriously chaotic celebration of American childhood where every corner, shelf, and ceiling space bursts with colorful reminders of simpler days.

Skeletons in bikinis, jack-o’-melons and trick-or-treating in the heat. Summerween, a faux holiday first celebrated on ...