Suggest you check the website for updates and pricing.

Kids always get bumps and knocks where ever they are, there is nothing here that is particularly dangerous for kids, we took a 7 and 9 year old with no problems

Largely depends on the 3 year old. There are activities which would be suitable, but not a lot. If your 3 year old needs to be constantly entertained with changing things they will get bored quickly, we took 7 and 9 year old, was good for them

Buy on the spot :) The queue can be really long, so it is also good to pre-buy if you can.

Suria Mall where Petrosains is, is never quiet but like the others have mentioned, non-holiday weekdays are the best

Yes they are open. Visiting Hours Days Hours Monday CLOSED (exc: on Public Holidays and Sch Holidays) Tuesday – Friday 9:30am – 5:30pm (Last Admission: 4:00pm) Saturday, Sunday & Public Holiday 9:30am – 6:30pm (Last Admission: 5:00pm) *CLOSED on Hari Raya Aidilfitri and Hari Raya Aidiladha.

1 - Yes! 2 - As per my review, if you want to make sure to get the best souvenirs, go there early. Also, if you have kids, make sure they are well rested and well fed because they'll be on foot for at least 3 hours. Avoid weekends at all costs because if the massive crowds and lengthy queuing times 3 - as above. Enjoy!

Yes , entrance fees for Malaysian with id is RM 20 and tourist are RM 30 . This are adults ticket prices .