What's sappenin' with this tree?

We spotted this funny stuff coming out of this willow tree in our grandparent's backyard. At first Sister Agent #1 thought it was honey. Sister Agent #2 thought it was sap. Looks like Sister Agent #2 was correct. However - we still don't know why its coming out of the tree.

The sap is gooey and sticky but looks cool! The only research we came up with is something might be wrong with the tree - some sort of pest infestation. Uh oh Poppy you better do something about the willow tree!!!!

What is this crazy lookin' bean?

Our first backyard mystery to solve is about this funny looking bean that grows off a vine by our grandparent's pool.

When you open it up it has these seeds in it. It was also wet and sticky on the inside. The question we have is - if you plant the seed will it grow? We know it's part of a Wisteria Vine. We have done a little research and found that these seed pods will help to grow a new vine, however, they are poisonous!! Good thing we didn't eat them!!!!