My FIL has form for baffling presents. Dh once got a book on the Toilets of Cornwall and, aged about 9, ds3 received a book of funny cat cartoons, called Cornish Cats, a book on Cornish cheeses, and a third book - the History of the Cornish Pasty. Just what every 9-year-old wants.
This year dh got a lovely poster of a vintage travel poster, and I got a set of Paddington Bear finger puppets, with two back drops and stickers to stick on - in a tiny box (stocking filler size). When we rang dh's brother to wish him and his gf and family a happy Christmas, we asked if they'd had any odd gifts - and it turns out BIL's gf had been given exactly the same Paddington Bear finger puppets. He was trying to be wacky!
Usually FIL's lady friend helps him choose presents (she is very good at it, and I get lovely Celtic earrings), but this year he went out unsupervised, and went hilariously off-piste.
If anyone has a small child who would appreciate some Paddington Bear finger puppets, I will pop them in the post.