Legoland Malaysia sits at Iskandar Puteri, about an hour past the Singapore border, and it is the day trip Indian families with young children most often add on. There is a theme park, a water park and a SEA Life aquarium on one site. Indian passports are currently visa-exempt for Malaysia, though the concession has an end date, so check before booking. Allow for the immigration queues, which can add an hour or more each way at peak times.