Bath toys are designed to keep babies occupied during bath time. They are often made of inflatable, water-resistant materials like plastic or rubber. Colorful bath toys can help improve babies' eyesight and color recognition ability while also making the bath more fun. It is important to clean bath toys regularly to prevent mold growth, as they are subject to mold when made of materials like plastic that bath water can get trapped inside of. The cleaning process involves drying the toy, using a vinegar solution to clean inside parts, washing outer surfaces with dish soap, and drying completely.