My almost 2 year old daughter received this for Christmas this year (1 month ago). She loves to play with it as a train - she lets her stuffed animals ride it and even tries to ride it herself. As a puzzle, she has mastered the 'take it apart' aspect, and is learning to put it back together. It is a well designed puzzle that will be challenging for younger toddlers - some of the reasons that you'd choose block X over block Y are subtle - but it is still a serviceable train most ways you can put it together, although it might look odd. It is very durable and safe. My daughter has sat upon it, stood on it, and dropped it on a wooden floor. So far it is still completely intact. Nothing has chipped or come loose. This is another great Melissa and Doug product that will be enjoyed for many years, provided we can avoid losing the pieces. Toddlers can play with it on a simple level - it is a train - or a more complex level as a puzzle.