When you're not sure if you built something right, or want to check out some of the other designs the Tesla Kit has to offer, open the LightUp Lens or the LightUp Learning apps with your Apple device and hover it above the microcontroller and watch an image of the completed circuit appear over it. If you did it right, the image will shine green and it will show you how the current flows through the blocks. If not, it'll tell you what you need. If you want to make something new, scroll through the selection available in the app, which updates with new projects every week.
One of the projects, the Theramin, required more pieces than were included. A LightUp co-founder responded to my email very quickly, acknowledged their error and that it will be corrected in a future release of the app.
When we encountered some other confusion along the way, support was always very speedy to reply.
Laugh & Learn Puppy's Activity Jumperoo
VTech Baby Peek-a-Bear Baby Phone Pink
VTech Baby Peek-a-Bear Baby Phone Brown
Baby Beats Monkey Drum
from VTech Baby
Play-Doh Shape and Learn Letters and Language
from Wining Moves Games
Think and Learn Spell and Speak Sea Turtle