Manage the Tool Bar
You can customise the tool bar that is shown in GeoGebra. This might be handy if you want to do a ruler-compass-construction. You can also use a customised tool bar in order to help the students.
You customise the tool bar under the menu Tools->Customise toolbar...
Create a Tool!
You can create your own tools in GeoGebra. This is a useful feature if you need to do the same operation several times.
- Start by creating your construction
- Choose
Tools->Create New Tool... - Under the tab
Output Objectsyou choose the objects your tool should create. These objects are the result of your tool. ClickNext - Under the tab
Input Objectsyou choose the objects needed to create the result. ClickNext

- Name your tool and click
Finish
The Sierpinski triangle
The recording below shows how to create a tool to make a Sierpinski triangle.
further info:
Pascal's Tree for kids: http://splashscuola.altervista.org/esercizi/geogebra/5-frattali_casette01.shtml
by Malin Christersson under a Creative Commons Attribution-Noncommercial-Share Alike 2.5 Sweden License