I run a Maker group for teens in Florida at the Pensacola MESS Hall. We are building a T.E.A. Laser powered by a Wimshurst machine along the lines of a Rimstar project we found on YouTube. But, we have some questions about the laser it will produce: (1) I read that the TEA Laser has high spatial coherence, but low temporal coherence. But, the pulse is very short. (It's an electric spark discharge in our version. It's very simple.) Since the pulse is so short, does that mean that we actually have pretty coherent light for the entire pulse in both spatial and temporal coherence? (2) Why is the light coherent? It's not bouncing around inside a medium to get coherent... So, what causes the light to be coherent? How do we know that it is spatially coherent? (3) Are there laser measurements we can do on a low budget with one of these? (4) We are doing a quantum eraser again later this year. We usually do it with $2 cat toy lasers. Any chance we could use our homemade lasers to do it? (5) (From the kids themselves) What is the most destructive or cool thing we can do with it once it is working?