The Battelle Developmental Inventory-2 (BDI-2) is an assessment tool that evaluates children's development in 5 domains from birth to 7 years old. It can be administered through structured activities, observation, and interviews. Each domain contains several sub-domains that are assessed through age-appropriate behaviors. While the BDI-2 provides a thorough evaluation of children's skills, its lengthy scoring process and potential for inaccurate parent interviews during observations are weaknesses. Administrators require training to properly use and interpret the assessment.