Check out more student examples here.
Open Paint and go to Resize.
Adjust your Paint window so your canvas fits at 100% - adjust the instruction window to fit.
Zoom in to 500% using the slider at the bottom right of the window.
Select the Rectangle tool
Draw out a rectangle/square (by dragging while right-clicking) with lots of room around it.
Set the Selection tool to "Free-form", making sure transparent is checked.
Select a part of the left side of the shape, making sure you use the entire side. Start outside and end outside the side of the rectangle!
Move the selection using the right arrow key to the other side. Make sure you don't use the mouse or go up/down at all! Then click off.
Repeat the previous procedure, selecting from the top and sliding to the bottom (or vice versa).
Give your animal some eyes, mouth and other details using a white or black Pencil and circle shape.
Now you can decide which colors you want your block of shapes to be.
So you end up with something like this...
Scroll to the right and all the way up to the top of the canvas so you're ready to copy/paste across...
Repeat the process, scrolling over the right each time for the next block of animals...
When you can't go anymore to the right, you've reach the other side, go back to viewing at 100%.
Select with the area that's completely filled with shapes, no white spots, then use the Crop button.