For 5th graders, 3D printing is best approached by keeping designs simple and small especially if it takes under an hour and avoid long wait times and use some app called Tinkercad and
When 3D printing, safety is the most important rule because the machines use high heat it can burn cause the printer nozzle and the metal plate can get as hot as an oven
or so never ever touch the inside while it's moving. and wait for the printer to cool down the n you can touch and using PLA plactic is fun compared to basect because has and lot more colors