Extra parts

Spintronic Switch

Overview Spintronic switches open and close circuits. Push it once to open the circuit. Push it agai...

Play Mat

This replacement play mat kit provides all the parts for a sturdy surface to set up and build your B...

Spintronic Resistor (100 - 1000 Ω) Variety Pack

Overview Spintronic resistors resist the flow of current. The higher the resistance value, the harde...

Spintronic Battery (6 V)

Overview This spintronic battery powers spintronic circuits. It provides a constant spin voltage of&...

Extra Support Beams

These extra support beams help reinforce your Bridge or Bust builds, adding strength and stability t...

Masts

These replacement masts restore your Bridge or Bust sailboat so it’s ready to support sails and cros...

Bridge or Bust Puzzle Book

A physical copy of our Bridge or Bust Puzzle Book is perfect for anyone who is looking to follow alo...

Assorted Plastic Parts

Assorted Plastic Parts from Upper Story provide additional components for assembling towers in your ...

Assorted Extender Arms

These assorted arms give you more options for connecting, bracing, and experimenting with different ...