I am assuming that you have already done the models section, so I am going straight into animation. I am going to simply make a cube move up and down. Like the models section, I am going to be using blender. First, you should know that animations are very well smoothed in glest, An attack animation only needs 2 or 3 frames, and 5 is the limit. For walking animations, no more than 7, depending on animation speed set in the xmls.

We have our cube, now we are going to add an armature to it. In object mode, click add and choose armature. Place the armature in the center of the cube. I prefer to turn it into the stick style.




























Once the armature is inside the cube, select the cube, then hold shift and select the armature. (In that order) now hit CTRL + P. Choose armature and link it to bone heat. Open a timeline in one window and go into pose mode. Now in frame 1, we'll be on the ground. In frame 2, we move the bone upwards so that we have it going up in the air. Since these frames will loop, we need to copy the 1st frame and paste it as the 3rd frame. Now set the end frame to 2 and we're good to go.

Export as usual and view in g3d viewer. If you did it right, you should have a bouncing cube.
See the video of what it should look like.  (File will open in Windows Media Player)