You could cut a watermelon into different diameters for layers for the cake stack them on top of each other and decorate with other fruits nuts or Bert and Ernie. It is a really cute cake I will try to post a picture if I can figure out how.
H,mmm... this should be fun. Pudding of course... chocolate or carob, i prefer carob but you could do a mix. avocado, carob and maple syrub. chocolate covered frozen bananas, homemade almond butter cups,
wait i just re-read it's your son 1st birthday. so the food is really going to be for everyone else right. my son only wanting watermelon balls on his first birthday :)
so for everyone else, all of the above. just what are you looking for make?