A colloid is a mixture of molecules that will and won't dissolve. This colloid is oobleck or blue goo. It is made of corn starch and water. The corn starch particles are too big to dissolve and float through water. Colloids are fun. Examples of other colloids are milk, fog, jello, oil paint and mayonnaise. 
Colloids! they look yucky! It's fun to learn new things isn't it?
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