1. Ask: How are the three train cars alike? How many boxes does each car have? What colors do you see? Does each car have the same number of blue squares? red squares? yellow squares?
2. Ask: Where is the yellow square on car #1? car #2? car #3? Repeat the same questions for the red square and the two blue squares.
3. Ask: Are the colors in the same order on each car? Do the colors follow a pattern?