
Preschoolers can describe a bubble's movement, and the movement of the colors on the outside of a bubble.
Preschoolers can count the number of bubbles they see in a bubble tray.
They can learn from their peers, by observing how other children use the bubble tools.
A dark spot appears on the top of a bubble, right before it bursts.
Pre-schoolers can watch for this spot to appear, and predict when the bubble will pop.

Preschoolers have better motor skills and greater breath control than toddlers, so they can experiment with adding air to bubbles both quickly and slowly, determined by how fast they blow through the straw.
Preschoolers can choose different bubble tools that will allow them to make small and large bubbles.