Do you know what would be sick? Heraldry themed diapers. Hear me out here.
Start with a white base and a choice of red, blue, or gold solid color landing zone with three stamp heads and ink pads.
Then, make a stamp with a whole bunch of independently moving frames on it, and each frame can rotate 360 degrees as well.
Have a website where people can customize their diaper. For a visual reference, sew Fantasy Name Generators' Coat of Arms creator but significantly toned down. Print only in black linework; more colors and fill colors can come later after proof of market viability.
Third, print in batches of ten and charge a market standard price.
Someone, please, tell me this is even possible, engineering-wise