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Toddler adorably engineers a nap while riding a toy train

Playing around is hard work, as one little rider discovered.
/ Source: TODAY

All aboard for station Zzzzzz!

We've all had those days, when you just play so hard you wear yourself out. Well, this toddler named Vivienne did exactly that, after climbing aboard her big brother's toy train, as the comments attached a video on YouTube reveal.

"She knows how to mount and dismount, etc., so I wasn't worried when I went into the other room to respond to a work email," the poster, Andy H., wrote.

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"She became oddly quiet (you know, like when they're being mischievous), so I quickly headed back to check on her. She had fallen fast asleep! Melted my heart."

And ours! Hope she enjoyed her choo-choo-snooze!

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