Kaboom, pow, smash. Put these awesome superhero word bubble stampers in your party favor bags. These stampers are also great for school projects, chore charts, creating your party invitations, scrapbooking, and decorating stationery. Have this stamp assortment in your party favors bags or the crafts table at your party, for home, in the classroom, or in the art class. Our stamps are non-toxic, lead-free has passed all CPSIA and ASTM testing. Safe for children to use.