Hey critters! stacking highlighters $5.99 Default Title Quantity Add to Cart This product is currently sold out. Please fill in the form below if you'd like to be notified when it becomes available. Your Email Hey! Critters Stacking highlighters are a delightfully whimsical approach to studying and note taking. These six totally cute and super cool neon mini highlighters are stackable and feature individual animal faces - the highlight of their adorable appeal.