YouTube father-son duo discover “What’s Inside?”

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Father and son, Daniel and Lincoln Markham became Youtube sensations after posting a video about Lincoln's 2nd grade science project.  Lincoln asked the question, "What's inside sports balls?".  Since finding out, they have cut countless things open to find out what's inside. They post weekly videos featuring things like lava lamps, bullet proof vests and even nerf guns.

To see "What's Inside?" visit their YouTube channel.