Short & Simple:
* Say "science" six times fast. (This is a classic!)
* Science is a silly sound to say quickly.
* The scientists studied science on the science side.
More Complex:
* Seven silly scientists said "science" while sliding on the science floor.
* Sally's science project was on the science of sound, so she studied science sounds.
* A scientist on a bicycle, with a science book in his backpack, screamed "science!" as he cycled down the science lane.
Bonus:
* Can you say "science" ten times in a row without stumbling? (Challenge accepted!)
Remember, the goal of a tongue twister is to be challenging to pronounce quickly. The more complex the sentence, the more fun it is to try!