Snap Circuits UC-30 Upgrade Kit SC-100 to SC-300 Price:  $29.95 (as of 20/10/2019 12:09 PST- Details)

Get the additional parts and manuals to take your Snap Circuit Kit to the next level
UC-30 Converts your Snap Circuits SC-100 to the Snap Circuits SC-300
Includes 30 new parts including AM radio components, transistors, ICs, capacitors, resistors, and more