For a child's toilet, use potty tag.
Artist.
Japanese name: お丸。 (Omaru.)
https://www.pixiv.net/users/1122406
https://www.pixiv.net/stacc/tkbb8
https://twitter.com/omaru7
https://twitter.com/intent/user?user_id=972823376300359680
https://seiga.nicovideo.jp/user/illust/825461
http://www.nicovideo.jp/mylist/30282430
https://www.nicovideo.jp/user/825461
https://sketch.pixiv.net/@tkbb8
http://unko77.blog.fc2.com
http://photozou.jp/photo/top/901120
http://www.ustream.tv/user/omaru7
https://www.pixiv.net/stacc/omaru7
http://p.twipple.jp/user/omaru7
http://twitpic.com/photos/omaru7