Every now and then I come across a new product that's so simple and so clever, that I think to myself, 'Why didn't I think of that?' Answer: because I'm not clever enough. It happened this week when someone sent me some Blinds In A Box, temporary paper window coverings for people who have just moved house, are renovating but still need privacy, or, I suppose, need a super-cheap alternative to the real thing.

Imagine yourself as a child making a fan out of a piece of paper by folding it this way, then that. Blinds In A Box are essentially that, with a bit of sticky back plastic (as they say on Blue Peter) to stick them to the top of the window and a couple of peg-like clips to fold them up during the day. They come in white or black(out) in a standard width of 91.5cm, and can be overlapped for a bigger window or cut for a smaller one.

Better still, there are no tools needed, they're durable, reusable and recyclable. Mine have gone up in the bathroom - for some reason my other half is convinced the neighbours have binoculars trained on his evening bath, so they were a must - and I'll probably pass them onto my kids to draw on when I've finished with them. A box of six blinds costs just £45 (plus p&p), including clips. For those of you looking for the real thing, we'll have a new blinds buyers' guide up later. I'm now off to invent a bumper for my car that reforms itself every time I hit the trolley stand at Ikea, which for some reason seems to have become a regular event…