Neon Waves Terrific Trimmers Sold as 1 PK. Decorate classrooms and enhance learning environments with durable, Neon Waves Terrific Trimmers. Versatile, precut and reusable trimmers frame learning displays on bulletin boards, whiteboards and walls with a scalloped design. These trimmers coordinate with Trend Ready Letters. Trimmers are ideal for prekindergarten to 12th-grade (ages 3 to 18).