This file includes 3 hands-on, QR code activities that provide 3rd and 4th grade students with practice using liters and milliliters. It includes a word problem practice, a partner activity, and a cut and paste sorting activity. Each practice includes an answer key and two of the practices are self-checking. Students will enjoy practicing these activities as reinforcement or extension of metric capacity instruction. Students must have access to an electronic device with a QR code scanner to complete the activities.