Wethepeople make the best BMXs, I've had them, my kids have had them, they are always excellent. 

The Curse 18'' is a durable freestyle BMX, it's strong but it's light, so it's the perfect bike to explore new tricks with. It is built with solid ÉCLAT "surge" pedals and a strong stem from SALT specially designed for junior riders to enjoy street riding or improve their performance in the skate park with.

My son had this one from when he was 10 to 12, really enjoyed it and was able to learn some pretty cool tricks on it. He'd probably be fine with it for another year or two before graduating to 20" too except he wants to ride to school & all his mates have mountain bikes, and my wife has recently imposed a one in one out policy on bikes :-(

It does have a few scratches, mostly from being put in the car to go to the track / park tbf, but it rides like new - these bikes are built so well & components chosen so well they really do last.