LEGO Education Spike Essential Toy Set is an essential curriculum units are designed around playful narrative-based problem-solving with relatable themes that can develop young students into independent Steam thinkers. Essential includes 5 units that focus on national standards for both lower and upper elementary grades. Each unit is comprised of seven to eight 45-minute lessons, plus language arts and math extensions for each lesson. This is 50 hours of classroom content in total. During each lesson, students brainstorm and develop creative solutions through trial and error while collaborating with their peers..