We love it. A while back my 3 year old was really into Lego Duplos so I figured she would love that too. This is an imitation of a Lego set. Some parts are smaller than Lego Duplos but compatible with Lego Duplos. It's also fun on its own as a set. The instructions are pretty simple. You may have to look closely to see exactly where each element lands, which is a little tricky for a younger child but maybe for a child over 5 or 6 years old. I did it myself when scaling to stay awake. My 3 year old daughter was impatient at first but enjoyed putting stickers on and giving me a little help. The parts are well made and fit together well, that's how the layout is designed, I feel like they need more support to make it more solid. You can also increase the incline to make the balls fall more evenly. But in general, combining lego bricks with marble walkways is a very good idea. Ideal for children from 3-4 years.
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