This video of a three-year-old seeing a train for the first time is the cutest thing you'll see all day!

Most children love tractors and fire engines, but Madeline is absolutely obsessed with trains.

For her third birthday, the youngster got to ride on a train for the very first time - and her reaction is priceless! 

WATCH MORE:
This five-year-old's genius method for tying shoes is going mega viral
Kids determine if Grover drops F-BOMB in viral Sesame Street video - their reactions will make you giggle

Videos don't get much cuter than this! It's absolutely heartwarming!