No prep! This product contains 4 ladders with a total of 20 different vowel consonant blends. Pick a letter and use it to climb the ladder and see what different words you can come up with! Any letter can be used for this product and the combinations are endless. Use this in whole group, small group, or individually to work on phoneme substitution and vowel consonant blends! Directions and a color & black and white option are both included.