Farm cake with sheep. The Party packs were little blue paper gift bags. I pasted my son's handprint on the bag and in the bag was a snack and a small "farmyard" toy for each child.
I have just arranged a Pony Party for my little girl's 5th birthday. She's crazy about horses.
The party pack was in a plastic bucket with sweets, chips and a horsey gift. The cake was a carrot cake decorated as a paddock with horses and trees, and I used wafers and pretzel sticks as the fencing. I make awesome caramel toffee appels which were decorated with smarties, hundreds and thousands and jelly tots.