The best tummy time toys often include small curved pillows for baby to be placed under their arms while they are on their belly to make it more comfortable. (thespruce.com)
While smaller curves are less likely to progress, many curves greater than 30 degrees do tend to increase over time. (yogainternational.com)
Pin worms - Pinworms are small curved worms that live as parasites on horses, rabbits, and other mammals. (boingonline.com)