This is a Base Plate For Block Building Breadboard. There are 6 available colors. It measures 13.2x9.2cm. It is uses with the Block Building Breadboard(1.5x2cm).
This Base Plate is to place the Block Building Breadboard. You can put different colors of the Block Building Breadboards on one base plate. Then put different components on different breadboards. That would make your experiment teaching quite clear.
After finishing the experiment, you can put the block building breadboard on the back of this base plate for next use.