Part science project, part functional object, this Casagami Solar Nightlight at Culture Label ticks both boxes, throwing in a bit of fun too.
It’s a nightlight, but one you build yourself from cardboard and the solar module that you can install on the roof. Once there, it picks up the energy to light the house, which it can do when the sun finally goes down.
Oh yes, you can decorate it too, which adds yet another dimension. Just £6.99 if you want one.