My husband and son have been to Cocomong Kids Land at Garten 5 (Garden 5?) a few times, but I've always had to work so today was my first time to actually go and see it. We made plans with a friend here and his 3 kids joined us. His oldest 2 kids have quickly become our son's favorite little friends here, and it's suffice to say that the 3 of them had a good time and will sleep well tonight.
Address in Korean: 서울 송파구 충민로 66. Phone: 02-2157-5718.
It's walkable distance to Seoul's subway Line 8, station Jangji, Exit 3. It's in a huge shopping and entertainment building called Garten 5 (maybe Garden 5; I can't remember) and it's on the 6th floor.