Below you'll find some demostration models for TinyModeler. Feel free to open them in the TinyModeler Editor and have a look around. You can't save the demo models, but all the rest of the Editor features are enabled. You can add and remove entities and relationships, play around with the property editors, and take a snapshot of your creation.
Temporary DemoEdit a Temporary Model
Create an empty, temporary model to play around with. You won't be able to save your work, but all of the Editor features will be available.
View one of the pre-made demos of common data modeling scenarios.