No. Only 3 passengers and 1 pilot are allowed in the Robinson R44 helicopter. Below are the details:
1 adult + 1 child: Allowed (You will have to book for 2 persons)
1 adult + 2 children: Allowed (You will have to book for 3 persons)
2 adults + 1 child: Allowed (You will have to book for 3 persons)
3 adults + 1 or more children: Not allowed