This is the Bandai 5058276 BB231 MS-06S Zaku II Plastic Model Kit

Bandai's "BB Senshi" line of "SD" Gundam kits (SD stands for "Super Deformed") are cute little comic interpretations of machines from the original Gundam series. Kits are molded in color and feature easy snap-assembly, suitable for young kids. Many also have little spring-loaded missile shooters that launch plastic projectiles (hands, bombs, etc.). Stickers included, too. Finished kits stand about 5-6cm high.