I've just tried a random booking and from the drop down on the child's age I was able to choose from 0 onwards.

I tried a dummy run and you could only put children aged between 2 and 11 in. The drop down starting with 0 was for the amount of children, not their ages.

It asks you to contact them for children under 2, I would suggest that you get your price then contact them to see how much extra it would cost for an infant http://www.co-operativetravel.co.uk/ shop around and if you find it cheaper ask them to price match.

Remember that you also get money back if you book and have a co-operative membership card.

it seems as though co-op travel and co-operative travel are 2 different companies They both have different looking websites anyway and I've just done a dummy booking- Cooperative travel came up cheaper than coop travel.