Converts SC-100 Snap Circuits Jr. into SC-750 Snap Circuits Extreme. Includes 52 new parts including CI73 computer interface and solar panel to build more than 650 additional projects. 52 new parts including: solar panel and CI73 Computer interface. 650 Additional projects!;From the Manufacturer; Get the additional parts and manuals to take your Snap Circuit Kit to the next level. UC-60 converts your Snap Circuits SC-100 to the Snap Circuits SC-750 by combining the UC-40 and UC-80 upgrade kits. Includes 52 new parts including AM radio components, transistors, ICs, capacitors, resistors, recorders, a meter, CI-73 Computer Interface, a solar panel, and more. 650 more projects.