rig something up

to prepare something, perhaps on short notice or without the proper materials. We don't have what's needed to make the kind of circuit you have described, but I think we can rig something up anyway. We will rig up whatever you need.

Kits are useful. They help you "rig something up". A frame for furniture, a working 'rig' of a machine, a structure.

Kits are good to have in a makerspace.

Kits are useful. To make something quickly. To make a rig.