I made this for my son’s 4th birthday. The detail on the tractor cake was done with colored chocolate (white and milk chocolate). For the hay bales I cut squares of cake, frosted them yellow and rolled them in browned coconut. I think I got that idea from this website :)
I wish I had thought more about how to connect the tractor and the wagon. I had to wing it at the last minute with the “male” piece of a wooden train set and a broken necklace.