I have no kids but I definitely found that waiting for the print was tough! Often what I do now is I get all my design work done at night. have fun getting design features sorted, or searching online libraries for printable parts, then get everything configured and start the print before bed. Watch the first layer or two to make sure it's gonna work, and then go to sleep while its printing. I wake up and the print is done!

idk if this would work for kids but it works for me! it also means that prints which are 8-10 hours don't feel long, because I start it an hour before bed time, then as I am waking up and doing my morning routine the print is on its last few bits!