This might help, here are some examples of bookings:
For example: You have 2 adults, 2 walking children and a 5 month old baby sibling? you would book a 4 seater table. (prewalking sibling baby can sit on a lap and won’t play so doesn’t need to be counted and is free)
Another example: You have 3 adults and 3 walking children? You could either book a 4 seater and a 2 seater OR you could book 2 x 3 seater tables (Don’t worry we will put you together if the tables are both booked at same time)
Another example: You have two adults and one pre-walker? You need to book a 3 seater and pay £5 for the table.
You can book a 3 seater table even if there is only 1 adult and 1 child, its the same price if you book it as 2 adults and 1 child.