12-Year-Old Atlanta Twins Turn 3D-Printed Toys Into a Business

Most 12-year-olds spend their free time on video games or sports. Aaron and Alain Osirus spend theirs running a small 3D printing business out of their playroom in Atlanta.

The idea started when Aaron noticed his classmates carrying colorful fidget toys at school. If those were plastic, he figured he could make them too. His parents loaned him $600 to buy a 3D printer with an automatic material system that can switch colors mid-print. He began selling custom fidgets and articulated toys to classmates and neighborhood kids, setting his own prices based on design complexity and size.

Demand grew fast enough that Aaron brought in his twin brother Alain to handle operations. Alain manages scheduling, cost tracking, and marketing. Together they produce pass-through fidgets, articulated figures, and custom designs. Their most expensive piece, a four-color kitten that takes a full day to print, sells for $5. Repeat customers get a 50-cent discount.

After covering filament and electricity, the twins clear about $200 in profit each month. That is not college-fund money, but it is real revenue built from scratch. Industry data suggests 3D-printed products can carry 70% to 90% profit margins because raw material costs are low. The brothers keep overhead down by doing all the printing and packaging themselves and only calling in friends when orders spike.

The twins say the business has changed how they think about money and work. Aaron enjoys the moment a customer picks up a print he designed. Alain values the experience of running something with his brother. Both plan to keep the business going through high school and beyond.