For Matilda, who is now a toddler I usually have 2-3 snacks, water bottle, a nappy & wipes, plastic bag, spare top, and a toy & a book. Depending on how long I may be out I often bring a spare set of clothes & a jumper in the car. If I am taking the pram I keep a jumper at all times in the pram & 2 toys in the pram.