A category cube is another favorite music aid for singing time. On each side of the cube is a picture representing a category of primary songs, such as Action, Gospel, Jesus, Family, Seasons, etc. A child tosses the cube and then the children are challenged to think of a song to sing from that category. You can ask the child who rolled the cube to think of the song or open it up to the whole group. Younger kids nearly always need help.
You could adapt the idea simply by labeling pictures with the categories and then laminating them. Put the pictures in the pockets of an apron or a sack to draw from. Or, put them face up or face down on the floor and toss a bean bag to choose one. In an emergency you could just write categories on slips of paper and choose them from a basket or can, but the pictures really seem to help the kids. Rolling the cube makes the choosing more random. The same category comes up frequently when rolling the cube, but that's okay because there are so many songs still to choose in each category. If you want to remove that randomness, use either of the adaptations. This way you are sure to have each category chosen.
I have two of these 6-inch cubes with different categories. I keep one handy for when the kids have had enough of my planned activity. The cubes are also useful when I have extra time.