The idea itself is great. At this path may itself not slipping, the modules are compatible with the original Lego ... and you have not finished web which is always the same.
BUT: the material the set forth here is not nearly comparable with Duplo bricks (must also not). But for the anyway very proud price is not nearly justified.
The plastic is quite soft, the rails hold not neatly on the blocks. You slip from the stones and the base plate upward away. Thus, the web is imprecise. It has constantly between the individual rail parts stages in the train. We are constantly pressing in on only because the balls remain so naturally hang. The balls themselves are also extremely light.
The whole thing is reasonably usable once resorting to original Duplo blocks and plate and the Hubelino set only uses the rails.
BUT: for the price of 70 is of course completely coated.
In addition, the manual is very lean. A path is described in detail, two alternative constructions are only displayed and almost incomprehensible. Since imagination is then stop asking.
Well then: return falls away because our son of course does not like to give up the path.
We use them now with the other base plate, Duplo and original glass marbles ... and annoyed about the price.
Very sad ... I hope the manufacturer revised the material ...