Our experiment is working ok. A stalactite had formed. However, you can see that the solution is dripping too fast and making a big puddle on the tray, but no stalagmite. I took this picture and then tried to reposition the cups and string a little. And then I broke our stalactite. I Went from cool mom to "Oh man mom" in a second. Oh well, hopefully it will grow again and this time I'll just let it drip wherever, that's what the tray is for.