I must stress, this isn't posh kit. Yes, your kid can absolutely do it. This is me holding a £250 cameraphone to the eyepiece of a £70 high school bog standard microscope, with a desk lamp pointed at it.
I scraped moss from the tarmac in front of the school, shook it in water, and put a drop of the sludge on a slide.
The challenge is finding your tardigrade...