I'm not sure about the bananas. The PB doesn't because Bindi makes sure to get ALL of it. Freezing helps with the messiness, too. You could give it a shot while Gabby is confined to the kitchen (with or without you in there too) and see how messy she is with it, maybe. If you give her the Kong tonight, I bet by tomorrow she's ready to do ANYTHING to get it again. They are awesome.