We also got some K’Nex dinosaurs. But dinosaurs from mini K’Nex like the ones Jane has didn’t fit us. These models fall apart when my kids play with them. But our set is original K’Nex – Dinosaurs 20+Model Building set. It has a very variable (according to the children) thing – the screamer. It works by some logic no one but this thing can understand and sometimes makes scary dinosaur roar. Does Loz have something like this?