The card is there for 1 to 7 days. For children 4 to 11 years there is the very economical children's day ticket.
GVB day or multi-day tickets provides you with unlimited travel throughout Amsterdam, day and night, on the bus, tram, and metro. And for the number of hours that best suit your plans. The day ticket is valid for 24 hours after you first check in.
Note: these tickets are only valid in GVB metros, trams, and buses. Thus, these are not valid in the regional buses of Connexxion and EBS or on the train.