In the past few months, we have covered plenty of cool educational kits from littleBits. The littleBits Workshop Set is a product designed for educators, makers, and schools. It comes with 160 bits and can support up to 32 users. There are many lessons online for users to get started experimenting with this set.
The kit includes multiple fans, dc motors, buzzers, sensors, buttons, pressure sensors, and other cool components for you to play with. More info is available here.