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.

Finished kits stand about 5-6cm high.