I just did this really quick at school, might change it later.
EDIT: There. I changed some stuff.
nice duck but this neads a bit of work! like the background needs some more shading! with propper shading you could have just 3 or 2 colours for it! and the other things nead a bit of anti aliasing! and perhaps ad a darker white to the dusk so that it is easier to destinguish it's shape! the lighting on the beak is great, looks shiny. and the eyes are in perfect position, but the legs might nead a bit of work.
I realy like the shading of the log! that one looks good! But how many colours did you use on the leaf? it looks like more than one! overall it is a good concept. nice.
EDIT: Oh i just noticed the pilow shading on the duck's wings! you don't realy nead that there. it just makes it more confusing.
Nice like this style cartoon ;-D