Tux Paint Stamps is a "stamps" collection, an optional add-on for Tux Paint for Windows.
Tux Paint is an open-source drawing program for children, which is very easy to use. This collection contains several ready-made images, categorized by type: animals, clothes, food, hobbies, household, medical, military, natural forces, people, plants, seasonal, space, sports, symbols, town, and vehicles. You will need 50+ Mb of free space on your disk in order to install all the stamps!
This image library will be installed in the same directory where Tux Paint is. Once installed, a new button called 'Stamps' will be added to your Tux Paint interface. When pressed, you will see a new toolbar on the right border of the screen, which displays a button for each stamp available. Clicking on any image will cause the program to read aloud the name of the stamp you have chosen. Then, by clicking anywhere in the canvas, you will place a copy of the image, that you can later modify using Tux Paint.
These images can also be downloaded individually from the official site of the program.