Alright it may or may not take 5 minutes, but this is a really simple DIY to kind of spice up a fridge at possibly zero cost if you scrounge up some random knick knacks from your box of hoarded stuff.
If you're not a regular hoarder like I am, stuff like these are available for pretty cheap in stationery shops and craft shops. Although I cant speak for the magnets. I recycled a magnet piece from an old fridge magnet that broke apart and got some magnet strips from my old clay kit.