Minna Unchi
English name: Everyone Poops
Type: OVA, Episodes: 4
Aired: Oct 25, 2000
Source: Picture book
Rating: G - All Ages
Synopsis:
Episode 1 - Kakakakaka
Episode 2 - Kakushitano Daare
Episode 3 - Nee Ohanashi shite yo
Episode 4 - Minna Unchi

(Source: Official Site)