OK, I understand now. In case you read this later, I wanted to respectfully suggest that fourth grade was the wrong classroom for you to be in: * fourth grader

OK, I understand now. In case you read this later, I wanted to respectfully suggest that fourth grade was the wrong classroom for you to be in: * fourth graders are still developing their fine motor skills and not all will be physically capable of construction-type work. * fourth graders don't really have enough science background to understand why they should be interested in microscopes (let's say, they would learn more playing with a 2-10x magnifying glass) * as you identify, fourth graders have short attention spans which are still developing. If you're teaching, you have a responsibility to manage this. If you were going to demo to a seventh grade class, I would warn you of the same issues, honestly. On the other hand, I would be very excited to have you in any classroom eighth grade and above.