After years of using a rainbow path Goal Chart in my classroom, I decided to try something a bit different this year. I bought a Lego kit that can be assembled and reassembled in three different ways. When my students do something of note, they get a 'Lego build' which means they get to do a step in the book toward completing the Lego creation. Once the whole creation is complete the class gets a reward such as free time on the computers or extra play time outside.
It's simple enough, but also fun and my students put in the effort to get a Lego build. Lego builds are awarded for class achievements such as: walking quietly in line, working well on a task, keeping the bag area tidy etc