What makes Happy Heinys so special? Every single diaper is still proudly sewn by a small team of sewers in the US. Happy Heinys has many award wining designs but one of the cutest is the Happy Heinys Mini for newborns. You should check them out! Happy Heinys are easy to wash and care for, with eye-catching colours and fun prints, and soft fabrics, Happy Heinys is a reputable brand that we can highly recommend to our customers in Canada.