Ideas for My Babies 1st Birthday Cake

These are just a couple of sketches/pictures that I made for my son's 1st birthday party set for January. I am in no way done with them, but I figured that I may need some ideas on this one. If you have anything that I might need on here or need to delete, please feel free to post a message/comment. For his little cake, I am going to do a dump truck or a backhoe or something. Thanks in advance for all the advice. And Ideas.