My son turned 13 in July but he was still using a Bananas in Pyjamas U-pillow. It was third hand when he got it in his toddler years and the cover was ripping and the stuffing falling out. In addition to that, it simply wasn't cool for a boy of his age to have it propped up on his bed.
I realized around this time that I also was storing two Queen size flat sheets that were probably never going to be used. Rather than give the sheets to the Salvos and then go and buy my son a new U-pillow, about which I'd inevitably do research first to find an ethical manufacturer/supplier, I decided to used the sheets to make him a European pillow.
We have three European pillows in the lounge room which I set out to reproduce.
For me it was a major project because I'm an unskilled and inexperienced sewer. I drafted a pattern, sewed a pillow, stuffed that pillow with the stuffing from the old B.I.P. U-pillow and made a cover. At one stage I got a little over-confident and cocky and was forced to unpick some of what I'd sewn. That glitch was caused purely by not checking the existing cover before launching into the new one.
Anyway, ultimately, I completed the pillow and now my son has a new and much more age appropriate one.