Classes for a 18 mth old ( Malaysia)?

I am a stay at home with a 18 mth old boy and live in Kajang, Selangor. Sometimes it gets a bit boring staying at home the whole day and my son starts to get hyper and restless.We do go to the playground every evening and do activities like painting and 4 piece puzzles and stuff at home but that doesn't always interest him. I was thinking getting him out and getting him to participate in interesting activities a couple of times would help. Any suggestions on what and where? Thanks in advance.