Here is my display of how we keep track. We are 3 weeks in, so they should have earned vanilla now. Some kiddos haven't earned a thing which is pretty unusual but I have few who really don't seem to care about much. :(
I've had some teaching partners who have done things similar...one has done something for only 4 weeks where they did 3 different kinds of fruit and a fruit dip. Also one has done ice cream sundaes. So you can adjust it to something that works for you. Some use clip art for their pictures/decals. I did all mine myself...I use cotton balls for whipped cream, yellow felt cut out like a banana and little things like that.