Courtesy Hake's Americana, here is a set of three Fisher-Price pull toys circa 1939-1942. These pieces were originally sold as part of the "Walt Disney's Easter Parade" set in 1936. According to the Hake's auction description the toys measured approximately three inches tall.
The characters made their appearance in the 1934 Silly Symphony Funny Little Bunnies, which was released on March 24, 1934. The short was directed by Wilfred Jackson, (who helped develop the method in which sound was synchronized in the third Mickey Mouse cartoon, Steamboat Willie), with animation by Wolfgang Reitherman and Art Babbitt.
Click here to go to Rob Richards' blog "Animation Backgrounds," to see some of the background art, which appeared in the short.