Using nice images can enhance the learning environment and make it much more appealing, especially for younger learners. However, I am well aware of my own limitations when it comes to making nice looking images.
The current version of Reeborg’s World uses png images with transparent backgrounds and size 40 by 40 pixels. [This unusual size has been chosen for historical reasons.] Many of these images have been adapted from images found on https://openclipart.org.
If you would like to contribute some additional and/or nicer artwork, please get in touch.