FIRST LEGO League Explore UNEARTHEDRegistration Register your class to take part in FIRST LEGO League Explore UNEARTHED by choosing the 'Registration only' option and the appropriate class size: 18, 30 or 32 students. Classes of 18 or 30 work in groups of 6 students; classes of 32 work in groups of 4. Registration includes: 3, 5 or 8 UNEARTHED Explore Sets Team Meeting Guide 18, 30 or 32 Engineering Notebooks 18, 30 or 32 Explore Medals UNEARTHED Teacher Guide, created by the DCU