This page shows the various Cake Toppers which also includes some picks that can be used to decorate and make up a scenery on a cake such as the various plant picks.  Use your imagination or look up various websites for ideas such as Wilton.com or BakeryCrafts.com.
Wilton's Bobblehead Fisherman
Wilton's Frustrated Fisherman
Tiny Ballerina
White Male Plastic Figure
Black Male Plastic Figure
Black Female Plastic Figure
White Female Plastic Figure
What is a picnic cake without ANTS.  Get  your own ants for
$1.00 a 6 pack
Rocking chair for that new Retiree's cake