I was going to say hungry caterpiller was a great book when mine were 1 !
FYI -
Tesco have it on special now for £3 in a box with a soft toy caterpiller, also a spot the dog book and toy and also a monkey toy and book. All little board books , so I brought all three and my 3 kids are giving Devon one book each for xmas or bday (6th Jan!) , they make lovely pressies
Go to carboots as this age group books can be imaculate and only 20-50p each!!! brilliant bargain