Do dead weight 'components' exist?
Power your board from a 12V 7AH Sealed Lead Acid Battery. Then hot melt glue your board to the side of the battery.



Similar to the ideas shown by @DaveTweed I have mounted prototype parts to a piece of wood to facilitate ease of use on a desktop or workbench. The following example shows work being done to modify the firmware in an existing product that had no existing debug capabilities. I built a small interposer to replace the native MCU with an instruction set compatible MCU that had full on-chip debug features. I also built an easy to use replacement for the device front panel with LEDs and tact switches and mounted that on the same piece of wood.