What should I do if the paint has dried?

A little water can usually remedy the problem if you encounter dried paint. Mix in a few drops at a time until the paint regains its original consistency. Be cautious to avoid adding too much or too little water, which could lead to over-thinning or still-thick paint. To prevent this issue in the future, invest in a high-quality paint by numbers kit from a reputable supplier like Artisue, which guarantees the use of superior materials.