BATTOP Marble Run Building Blocks Construction Toys Set Puzzle Race Track for Kids-97 Pieces

Not too easy for my 6 years old. An hour or so to complete. But she did it all by herself until the end. I got to make the marble balls snapped tight. Quite a beautiful set overall.

Bonito y retador para el niño a desarrollar sus habilidades constructivas

Just OK - the pieces dont fit together firmly so it all falls apart at the slightest nudge. I was quite surprosed given all the glowing reviews! Wouldn't recommend.

I bought this for my son's 5th birthday. He has built it almost every day for the last 3 weeks. It comes with directions for 2 ways to build. I felt the directions were clear. My son needed a little help with the directions at first, but can build independently now. There is a flaw: the marbles don't consistently make it all the way through the courses you build with the directions (hence the slightly lower rating on Easy to Assemble). Some times they do, sometimes not. That bothers me and my older kids (ages 8 and 10), but the 5 year old doesn't seem to care! I disagree with other reviewers who felt the pieces didn't fit together tightly. They are sturdy and fully compatible with duplos, and it really adds to the fun to combine them. I personally enjoy "tinkering" with the set and building new runs, as does the 5 year old. Building from the directions a few times first helps to understand how the different pieces work. If your child is a perfectionist or doesn't enjoy "tinkering" and "trial & error", they may find this set (or any marble run) frustrating. One thing I like about this duplo-based set over other marble run sets, is that it only takes a few of the pieces to easily build something that's fun to put marbles down. Plus, my kids are such frequent Lego users that there isn't much of a learning curve to making the set work. Overall, I'm glad we bought it!

Sturdy block but the balls broken regularly