Travelling with children on the Bibus public transport network? Find out all the fares granted according to the age of your children and the various advantages you can benefit from : Children under 6 Children under 6 travel free on public transport. Children aged 6 to 7 Children aged 6 to 7 benefit from a reduced fare (€9 instead of €14.50) when they buy a 10-trip ticket. You must be able to prove the child's age by presenting the family record book or a piece of identification in the event of an inspection. Children under 10 If you travel with an annual pass, the journeys of your accompanying children under 10 are free (up to a limit of 3 children). Large families Families with three or more children can benefit from reduced fares thanks to the large family card. To apply for a large family card, you must first test your eligibility on the large family card home page by clicking on “Order”. If your family is eligible, you can then create your personal account and order your cards. You will then need to scan the supporting documents to prove your family situation and attach them to your order. Finally, to finalize your online order, you'll need to pay €18 incl. VAT (regardless of the number of cards requested) by credit card.