I would say that the puzzle is "eye-catching", but my son thinks it's bombastically cool. I believe it's not a generation conflict, but simply children's love for bright details and trains. There are a total of 6 pieces, with the most challenging ones for assembly being the 3 wheels - they have very similar but not identical body parts.
The board thickness is about 0.8 cm, and the pieces are about 0.3 cm thick. I think for children under 2 years old, it's better to choose pieces that are a bit chunkier and preferably with handles.
Dimensions: 22 x 17.5 x 0.8 cm