Here is a quick Pongal-themed craft. My 2.5 year old daughter was very enthusiastic about it and especially liked the part involving sand. I gave her the printed pot and rhinestones and she automatically stuck them inside the circles and triangles without any directions from me. I was surprised to see that she had conceived the idea of decorating these patterns. You can download the Pongal Pot template here.
If you do not celebrate Pongal, the 4 day harvest festival in your part of the world, you can read here to get an essence of it (includes an excerpt from a book I enjoyed reading).
And I have explained below how we did it. But you can do the same with whatever supplies you have at home. After all, crafting is all about imagination and creativity :)