My mum has asked for new knitting needles, so I am clubbing together with my siblings for a really nice set, and my Dad needs a new computer mouse, so they are sorted. MIL always hijacks the kids' colouring, so thinking of getting her her own colouring book! FIL literally has at least one of everything (including a female replacement hip and a scale model of one of the terminals of Singapore airport!) so no clue for him! Hmm, come to think of it, Hayden is always pointing out the holes in his socks, so maybe we'll get him some new ones!
The calendar thing is a good idea - I have done them for both sets of parents before and they went down well. My Dad is a keen amateur photographer and one year I snuck in to their house and took copies of his photos from his computer and made those into a calendar - scenery and wildlife mostly, with seasonally appropriate pics on each month - which he absolutely loved. Tia Maria and Baileys always go down well with my Mum, and MIL likes Ferrero Rocher, so maybe favourite drinks or treats?