I remember it somewhere between 3-5 RM. nothing more than 2 dollar SGD.

RM 75 with discount for MASTER CARD

Hi Angry birds is in covered area of a building. If you have any other work , you can leave them and ask them to come out at a specific place and time. There is only one gate.As a special request, they may allow you inside to pick up your kids. They can manage themselves, if they can speak english. (Since I do not know, which country , you are from...)

On weekdays it’s unlimited playtime but on weekends 3 hours max. Yes you can leave and come back.

Yes they have but limited rides depends on the height

Public holiday will be crowded. As the school holiday is friday,and they go to school on sunday, i prefer to go there on saturday

Yes & don't forget to bring socks

They provide locker rental services to the guests. But only small and medium size locker is available.

There is a taxi stand outside Mall of Medini or can ask Legoland hotel to help call a cab. Uber and Grab are also available. For buses, can check causewaylink (yellow bus) on their schedule from Mall of Medini.