I choose a commercial from Custom Declaration. This ad tells people to not pack any agriculture item without declaration.

Conception
This ad serves the purpose of warning travelers that "bringing agricultural items back is prohibited." Therefore I use cute and vibrant colors to catch their attention and add graphics into the animation to help viewers understand the damage that can be caused. 

and declare agricultural items. 

With your help, 

we can safeguard natural resources, 

and protect the food supply from invasive pests and disease. 

Whatever your destination, enjoy the journey and remember 

Don't Pack a Pest."