Till now I have completed the short tutorials of some basic tools of creo Elements/Pro and I think on the basics of those tutorials you can make some of part that looks interesting.
For a simple exercise
Try to make a piston without connecting rod you have to select the dimensions by yourself or you can Â use the dimensions shown in fig .
But I am giving you short steps:
1)Â Â Â Â Â Make a circle of Â and extrude it so it become a cylinder
2)Â Â Â Â Â Make extrude cut at the one end of cylinder
4)Â Â Â Â Â For making grooves for piston rings use Revolve tool after sketch
This test you should have to attemptÂ first Â and after some days I will posts its method.