The FIT0101 by DFRobot is a really easy to use prototyping plate.

Basically you can put everything from Arduino board to sensors, even a motor on top of it.  It fits M2-M3 screws.

NOTE: This product does not ship with the board shown above.  Please check the shipping list below for reference.

Specification

• Size:170x150mm
• Slot size:3mm
• Total weigt:350g (including all screws)

Includes

• Prototyping Plate (1 unit)
• M3 screw set (50 units)
• M3 * 10 Hexagonal Copper standoffs (10 units)
• M3 * 10 Hexagonal Nylon standoffs (10 units) 
• M3 * 20 Hexagonal Nylon standoffs (10 units) 
• M3 * 30 Hexagonal Copper standoffs (10 units)
• M3 * 50 Hexagonal Copper standoffs (10 units)

USA ONLY