It could be hidden away in a garage or tucked in the corner of the loft.
But it might be worth bringing it out because you could be sitting on a gold mine, because some old toys could fetch you a small fortune.
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We have rounded up 13 toys that could fetch you a princely sum.
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5. Pokemon games
It is not just old Pokemon cards that can fetch you a pretty penny, the games can also be collectors items as well. Older copies of the games are on sale on eBay and could fetch you hundreds - for example boxed Pokemon Yellow, Red and Blue are selling for £350. Photo: YOSHIKAZU TSUNO/AFP via Getty Images
6. My Little Pony
Dating back to the 1980s, My Little Pony remains popular to this day. However if you have some of the older toys, then you could be sitting on a gold mine. On eBay My Little Pony Breeze 2005 and Frisco 2006 figures are selling for £375 each. Photo: Matt Cardy/Getty Images
7. Happy Meal toys
McDonald’s has been giving out small toys with kids meals since 1979. Some of the toys have become popular with collectors. With the likes of the Barbie McDonald’s Fun Time playset on sale for £150 on eBay. Photo: David Paul Morris/ Getty Images
8. Power Rangers
Another 90s favourite, which still remains on TV to this day, Power Rangers had plenty of toys for fans. If you still have your old Megazords somewhere, on eBay bundles of Zords are selling for hundreds - such as DinoZords, MegaZords and Ninja Steel combo selling for £450. Photo: Justin Sullivan/ Getty Images