A tattoo applicator for applying temporary tattoos to a subject, the tattoo applicator including a handheld housing and a sponge moveably supported by the housing to moisten the temporary tattoo and to apply pressure to the temporary tattoo. In some examples, the housing defines a retaining slot for receiving a tattoo-forming sheet. In some examples, the tattoo applicator includes a timer. In some examples, the tattoo applicator includes a push rod and a tattoo mount supported by the housing, the tattoo mount defining a port through which the push rod extends. In some examples, the tattoo applicator includes a fluid reservoir mounted to the housing.