Yes, it is true. i am familiar with that area. the kids' playground is next to Sam'club. about 5 min walk. if you can find the church beside the Sam'club, then you wont miss the place you mentioned.
The entrance is on Qiao Xiang Road.
There are two entrances, one is next to Saint Anthony's Church (Nong Li Lu) and the other one is next to Sam's Club North entrance. (Between Sam's and Antuo Shan mountain) It's a New amusement park and looks good from the outside.
A small correction: Nong Lin Road （农林路）
It's been there for about 6 months, I wouldn't say it's good, It's like every other amusement park here, if you can get past every tom dick and harry, to actually get on the rides, it is probably not that bad.
I have been there twice, only to wait two hours in the queues, and wont be back, such are the norms of life in China!