I bought these for my 2.5 year old grandson. He's a bit young for them, but he's very advanced and loves to build and create different things. Sometimes he needs help to put them together without knocking off the pieces he already put together, but after playing with it 8-10 times this becomes quite rare. He loves building robots and flying machines and spends hours playing with his creations. The set contains 5 multicolored parts. Each color pairs slightly differently, allowing for a very versatile technique. Some combinations create rigid connections, others create flexible connections with different constraints. The ties are strong enough for kids to really play with their creations, not just admire them. Since my grandson loves them so much, I immediately ordered a larger set. I know he will have fun with them for years.
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