How do things grow into objects?

Hello, I was creating a game, and wanted to add an effect, like, an object of another born and grow in another. Is to do this? How is it done?

Sprites have a "Spawn Another Object" action under Creation category under the Sprites behavior tab.

Well, when a mummy object and a daddy object love each other very much...

dataflashsabot's answer is the win

But seriously now: If you want object to spawn/create another object just use action for it.

But if you mean that you want graphical effect of lets say box transferring into a ball then you have to do it yourself.