My 4 year old son loves building with them. They are very easy to use and offer opportunities for creativity. I recommend them for younger kids and maybe up to 5 or 6 years old, but I think older kids might like them too. The number of tiles is good and they are stable. I love that there are many ways to use tiles. My son has made toy dogs and cars out of them. It will be interesting to see what he creates with it.
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