There are a bunch of sounds, sights, smells, tastes and feelings that can spark nostalgia.
Whether that be listening to a song that you first heard in your bedroom in the 80s, watching Kids TV every morning before school in the late 90s, smelling the cake your parents used to bake for you or jumping on a swing in the kid's playground - there's no shortage of things that take you on a trip down memory lane.
Well, prepare to have your 90s nostalgia blown to pieces as the SEGA Mega Drive Mini goes on sale in Australia today.
It'll be available for $139 - which isn't too bad when you compare it with other gaming consoles.
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The 16-bit graphics will remind you of a simpler time: before there were smartphones, broadband internet, Netflix and really, really messed up weather conditions.
The company said in a statement: "The SEGA Mega Drive remains beloved in the hearts of fans the world over. In honour of this remarkable console, we have recreated the classic Mega Drive Does commercial to bring Mega Drive fans back to the glory days of the 16-bit revolution.
"This time, however, we're putting the focus on the powerful line-up of the SEGA Mega Drive Mini.
"Mega Drive Does. A simple phrase that threw down the gauntlet against the competition. More than just a catchy slogan that defined the strengths of the SEGA Mega Drive and its innovative library filled with arcade hits, those three words defined the confidence (and swagger) SEGA personified at a time when the competition was fierce."
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One of the most iconic things about this console was having to pull out the game cartridge and blowing on it to make it work again.
With the Mega Drive Mini, you'll have 40 games pre-loaded onto it and the selection of games is class.
There's Street Fighter, Sonic, Tetris, Earthworm Jim and loads other titles to keep you excited.
It's on sale now.
Featured Image Credit: SEGATopics: Technology, Australia