DIY Coffee Mugs = 4 dollar store mugs + sharpies + oven for 30 mins) - which I did, And I made sure I used my sharpies, not the generic ones. I was able to wipe the sharpie images right off. (use oil based sharpies)
Come learn an easy trick that will get you the most dramatic, puffy, foamy baking soda and vinegar eruptions and learn the science behind it! From Fun at Home with Kids. Baking soda and vinegar mixed with a tough of soap.