Custom objects are objects that are available in the game, Scribblenauts Unlimited on the WiiU and PC. For unknown reasons, possibly system limitations, the 3DS version has this feature completely gone. With online play, you can share your creations with friends. The creations can be spawned and interacted with like any usual object.
Custom objects are set to custom words, which triggers the object, and are created with pre-made parts.
Some options include:
If you have other players objects, you can even use parts from those, which is useful at times.Even though the game's title would suggest otherwise, you only have a certain amount of "stamps" (the objects you use to make your custom object) to use. But the limit is oretty high, and there are ways to work around the limit, which many famous object creators online know like making masks or objects to glue on.