It can be defined as followed. For fun or joy of someone.

The word college is defined as an educational institution of higher learning. A college is an advanced, organized, professional group with duties and privileges.

The answer to that question is based on personal opinion. Laser tag isn't "bad" for kids.

Laser tag is meant to be a fun experience and kids like to have fun. As such, laser tag is good for kids if "good" is defined as having fun.

Civilization is defined as a growing government and people. A civilization has one chosen ruler. Civilization is the place that we live in. If you want to get the idea of what it is like to rule a civilization, play the game Sid Meiers Civilization III. It's really fun and you learn what it's like to be a true ruler.

Ordinal numbers are defined as the way that numbers are ordered in a set of numbers. For example: 1; 2; 3. Examples can be found at the Maths Can Be Fun website.