I'm working on several bathrooms for different clients at the moment, both of which have small children. I'm a bit leery of children's baths because it is easy to get carried away with colorful tile and other fixed accents. For example, what happens when your five year old grows out of their favorite shade of hot pink? Additionally, what about Teenagers who develop strong opinions and *HATE* everything? Okay with a future renovation to change these elements, full steam ahead on crazy tile. If the client would like to avoid any further work I steer them to more neutral fixed elements highlighted by fun, colorful, and more importantly, changeable accents.
Here are some lovely neutral inspiration images which would facilitate easy changes such as paint color, cabinet hardware and lighting fixtures.