Monthly Code Projects for Kids. Bitsbox subscribers get a monthly box (or an emailed PDF file). It’s filled with dozens of new app projects that re-ignite kids’ interest in coding every month. Kids love getting physical stuff in the mail—Bitsbox uses that excitement to help them keep learning. For kids ages 6-12. Code apps for real devices. Starting at $20 per month. Shipping internationally. Founded by Ex-Googlers.