Vintage frog commercial art . . . . .adorably cute . . .. . both out of copyright and in the public domain.

Whimsical vintage advertisement for Doctor Thomas' nerve tonic featuring a lady frog juggling knives in a tutu. ca. 1870-1900.
Whimsical vintage advertisement for Wheeler & Wilson’s sewing machine featuring a lady frog juggling knives in a tutu. ca. 1870-1900. Chromolithograph. via digitalcommonwealth.org and bpl.org.
Christmas card with frogs holding umbrellas wearing boots. Victorian.
Christmas card with frogs holding umbrellas wearing boots. Victorian. via honeybet.typepad.com.