Steve Caplin looks back at some of the most interesting - and daft - crowdfunding ideas of 2018. There's a camping light running of a tea candle, a 4G phone the size of a credit card, music generated by plants, an add-on screen for laptops, a gravity light and a snorkel that lets you dive further as well as levitating water drops, the world's most advanced underwear, a magnetic wax seal and a rocking bed on chains.
