I placed the cubes, separated, in the lid of an egg carton. I chose Halloween colors but that did not make a difference for the game. I modeled the concept for Jake a couple of days before he 'got' it.
This is a photograph of me modeling it to Jacob. He added the pig finger puppet. Next he was able to help me place the pieces in each egg space. When he eventually did it on his own he did not separate the colors but that was not the point of the game. He was able to put the cubes in the spaces and I consider that success! We will continue to play this game and he should continue to make progress and maybe just maybe we will get to separating colors, but if not hand-eye coordination and the following directions is enough!