I'll post a message here when features in this general area start getting implemented.

It's really an excellent tool for play and learning!

Thanks.

What is an appropriate age starting to use Kojo?

I'd say around 9 or 10.

Is there any chance of introducing animation of 2D or 3D models with connections, movement, and forces like gravitation and magnetism?

The 2D case should be very doable, and some day in the not too distant future I plan to do some of this. 3D support is probably still further out.
Would you be interested in playing with trying to implement this? If so, I'll be happy to give you pointers and help.

Is it possible to use a more full featured IDE, like Eclipse, with Kojo?

Currently, no. This could theoretically be done, but I have not given this much thought.

Is there any chance of introducing animation of 2D or 3D models with connections, movement, and forces like gravitation and magnetism?

Is it possible to use a more full featured IDE, like Eclipse, with Kojo?