Does anybody have any ideas on how 2 make a crayola box shaped cake or any ideas 4 a crayola themed bday?

I want a crayola colorful themed bday for my baby's 1st birthday..Any ideas? I'm using the primary colors and would really like to have a crayola box as a cake. I don't know how to shape the crayons or how to make the colors. Please some istance for those bakers out there. I was thinking of using ice cream cones for the top of the crayons but i don't know. What do you think?