After frosting the cupcakes I started decorating them by piping two large leaves with blue/green buttercream. Next, I used a #8 round tip to pipe the body and head of the frog with light green. The legs are done using a #4 round tip.
I put the feet on using a #3 round tip and yellow buttercream. Finally, the eyes are done with a #4 round tip with red, and then black buttercream for the pupil.
Sweet Change: To make these a little differently you can use different colors to resemble different types of tree frogs, or regular frogs for that matter.