In Dream Blast, there are three boosters you can create: Red, Chuck, and Bomb. To create Red, tap a matching set of 4 or more bubbles of the same color. The more bubbles you combine, the bigger the booster will be.
Power up even further by combining boosters! Combining two Reds will create a Chuck that is the same size as the largest Red. Similarly, combining two Chucks will create a Bomb. Using these boosters is a great way to blast a large amount of bubbles at once!