It depends on what you want to do. We have 'starter packs' targeted for specific types of projects such as the Motor Party
and Music & Sound
packs. There is the Sensor Pack
and various multi-packs of switches, leds and other basic components.
Most of our sensors, displays and other components come packaged with 'extras', such as any resistors, transistors, and interface IC's needed to get them up and running.