Great for Goody Bags!
I had these put into a Science-themed goody bag for my som when he celebrated his birthday in his N2 class. It’s great for learning and piques their curiosity. Teaches a lot about light too for early primary school level children! Simple tool with many teachable moments! Here’re some fun activities: https://www.kindercare.com/content-hub/articles/2018/may/science-skills-preschool-magnifying-glass