I was watching a video and the guy said something that I couldn't understand the meaning, I searched in a lot of places and didn't find, its: skittle-high second-graders, this is the video:
at 1:35Second-graders are about seven years old. , Skittles. 1b3g0r7EaBw CJ
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Second-graders are about seven years old. They get hyperactive ("high") when they consume too many sweets, e.g., Skittles.