It's drop-in, it's open to 6th grade and up.
We have three activities with three librarians running them and people can stay with one and dig deep, or move from station to station to try things out.
This week we had our two new Cube2 3D printers with a bunch of laptops open to TinkerCad online. We started out printing some pre-designed forms we got with the printers, but the teens jumped right into teaching themselves Tinkercad basics and turning out their own models.
We had an area devoted to Lego Mindstorm and WeDo where a group built some robotic vehicles and a Ferris Wheel.
The last area was a soldering station where people could put the Makerbot badges together. This table will change next week to a more non-electronic craft activity and we feel it might be fun to cross pollinate the high and low tech projects to see what might come of it down the road!