Bee – it is the only one that stings
Sprout – it is the only one that is not a fruit
Number 45 – it is the only number that is not an even number
Plane – it is the only one that travels through the air
Emerald – it is the only one that is not a planet
Water – it is the only one that is a liquid
Elbow – it is the only one that is not part of your face
Australia – it is the only country that is not part of Europe
Fire – it is the only one that is hot
Table Tennis – it is the only one that is not a board game