Back when Pluto had some status in our solar system, a handy way to remember the names of the planets was the 'My Very Educated Mother Just Served Us Nine Pizzas' mnemonic, where the first letter of each word represented each celestial orb. But it's just confusing now that Pluto's gone, so maybe a set of planet-themed plates might be a better learning tool.
Available from ThinkGeek for $37 (£23 excl. shipping), this set of eight melamine 10-inch (25cm) plates feature lavish artwork by Leah Yael Levy so they look like Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, and Neptune. But they're microwave and dishwasher-safe too, so they can be easily cleaned without worrying about the designs coming off and another planet going missing from the list. [ThinkGeek]