Using these Colour-Changing Revealeons is easy! Just put them in warm water or hold them in your warm hands and watch their colours change. It's a great way to have fun during bath time or playtime. These toys are suitable for kids aged 3 and up. When you order, remember that the styles are randomly selected at dispatch. If you want a specific style, add a note in your order. We'll do our best to get it for you based on what's available. To make sure you get the style you want, you can also visit your local Toyworld store. After play, just rinse the toys with clean water and let them dry. Keep them in a dry place to maintain their quality.