Algodoo

Um...

This is the sticky glue inside the container. Drag to open the top of the container (Dark Grey) and drag the White marble into the glue, then drag the White marble stuck with the glue to play with it. If you make the White marble fall hardly, some of the Glue liquid (Light Grey) will be interacted with this marble.

I found the "adhesion"* value in the script menu months ago, so I decided to make the almost realistic Flexible Sticky Glue to make sure the adhesion in the
transparent pad blocking the Flexible Sticky Glue and adhesion in this Sticky Glue negate together.

Adhesion in this Sticky Glue MUST be positive, ex: adhesion = 7.0, or else it will repel/bounce other objects.
Adhesion in the transparent pad hidden under the Sticky Glue MUST be negative. Ex: adhesion = -7.0

There is also a variant which is called Anti-Glue (aka. Unsticky Glue) that bounces objects, unlike glue (adhesion = -7.0).

* adhesion (adj: adhesive): The value of the stickiness in an object. Example: glue

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Thanks for 3^7 for finding the value "adhesion" in his marble pack.