With every child having dozens of toys laying about the place sometimes you can't help but have a sneaky play yourself.
Well for this dad what he found when he was playing with his son's train track set was quite mind boggling.
And as any self respecting social media user would, he added some dramatic music and posted a video on Twitter for us all to enjoy.
The post has received thousands of responses and retweets with many users trying to explain the illusion.
Whatever it is, optical illusion or sheer magic, it definitely looks cool.
My toddler's train track is freaking me out right now. What is going on here?! pic.twitter.com/9o8bVWF5KO
— marc blank-settle (@MarcSettle) April 6, 2016
