Please, somebody give me some inspiration!
DB and SIL are 32 & 46, no children, 2 dogs, very outdoorsy, like walking and camping and so on.
Unfortunately, they already have most equipment they'd need.
They're also very practical and down to earth, for example I think they'd be a bit 
about something like solar-powered fairy lights for the tent.
What in the name of goodness can I get them for a budget of about £40 max?
(preferably online as I'm housebound with a 6 y.o with flu)