I bought 2 hours of play from groupons at $10 (usual $30) for one kid. The Indoor playground http://ho2t.com.sg/ is situated at 30 East Coast Road, Katong Village.

Katong Village is a small shopping centre. The Indoor playground itself is not big, when we went there in the morning, there were not many people, so the kids could run around freely.  The kids love to play with the ball shooters. They put the balls into the ball shooters, and they could shoot the balls around. There are also toys for younger kids around the playground. Of course, like any other indoor playgrounds, there are slides and balls pit as well. Personally, I think the playground is more suitable for younger kids, the younger the better.

Dash and Violet enjoyed themselves within the 1 hour. If I did not have medical appointment, I guess they would love to stay there longer.