I know The Lorax movie has been out for a while, but these cupcake toppers are all different and all adorable, and would be great for a summer kids' party. All for sale on Etsy - click through on seller links below photos.
Tulle pom cupcake toppers by Etsy seller Titi's Tutu's
by Etsy seller Wildvine Unlimited
edible toppers by Etsy seller Goodies by Melissa
by Etsy seller Marvelous Store
Truffula tree toppers by Etsy seller Katika Made