Oh, any recommendations for microscope for 2nd grader as well? Kids are fascinated with micro things.
There are tons of really cheap 'USB Microscopes' on Alibaba/Amazon that are probably more fun/accessible than a traditional glass microscope. I know I've gotten my young nieces/nephews ones that they can carry around and point at things, ones with goosenecks that they can stick down holes, ones that work underwater, etc., all for a ~US$20 or less. Most have BT so they can throw the images to an old iPad or retired Android tablet. They loved them.