As a PK-4 science lab teacher. With an eyepiece you get the same image as Galileo, a good history lesson to see how he accomplished so much with such a simple tool. And with another eyepiece with Barlow lens you get a much higher magnification. The assembly is fun, but takes significantly longer than the 5 minutes specified in the product description. It took me 30 minutes to do a skillful 3rd or 4th grade pace with maybe a little help from an adult. Can be assembled and disassembled multiple times. However, the 500 cm long body tube consists of two parts that are connected in four places. Contrary to the instructions, 2 O-rings should not be considered optional! If I plan to only assemble it once, I would use clear tape to seal the seams of the body tube. That would make it stiffer and prevent more dust from getting in over time. A tripod makes viewing more comfortable. At the very least, even a stable person will want to lean against something. Imagine Captain Aubrey staring at his enemy, feet planted firmly on his ship's rolling deck!