Re Galilean gravity ... For now, I suggest the much easier route of making "jpeg movies" (they are just a folder of images whose names sort in order). The Etoys movie player has an option for playing such jpeg files.

How does this work? I created a folder with a set of jpeg files.

From the MPEG movie Player, I clicked on the Menu button, clicked on advanced then on create JPEG movie from folder of frames. I then navigated to the folder with the jpeg files. Then I had to click on one of the jpg files. I could not figure out how to select multiple files or the folder as a whole. If I clicked on the folder name it simply listed the files in that directory. When I clicked on one file I was asked some questions which I answered but in the end no movie or even any image was displayed.

Anyway, I found a work around which is to put all the images in a holder and set the graphic of a sketch to the "graphic at cursor" of the holder and iterate through the images. But loading all the images was tedious. The advantage of this method (over using an mpeg file) is that when I save the project the "video" is saved with it. When opening a mpeg file using the MPEG player the movie is not saved with the project.

So, I think I'm closer to making this "kid friendly" (so that the stuff that is supposed to be easy is, ie: importing the video frames). I found some free software that works fairly well at exporting JPEG's from a Movie (avidemux2) which works on Windows, Mac and Linux. It allows me to easily edit and export the JPEGs from a selection within the movie.

The only other missing piece is a simple way to import the images.

A smalltalk script to add the images into a holder (in name order) would be nice :)

Thanks,

Stephen