How to describe a building set which is like LEGO without using the "LEGO" word? We are sellers of building toys like LEGO online. But their website does not allow using the word "LEGO" directly to describe the products. Are there any other words that could describe the building sets like LEGO? It seems that LEGO is the representative of all kinds of building sets.
The usual phrases I've seen include some mixture of the following:


Universal interlocking bricks
Modular building system
Plastic construction toy blocks


and so on...

But don't forget adding "Compatible with leading brands" if it is indeed the case :)