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|LRS2335: Features: -Jumbo test tubes.-Chunky, durable test tubes put serious science safely within reach for young students.-Supports inquiry-based investigation and hands-on observation.-Plastic tubes are safe at temperatures from 10 200 F and feature calibration marks (25, 50, 75 and 100 ml).-Hand wash.-Grades PreK+.-Ages: 3 +. Includes: -Includes 6 test tubes, different colored lids (to track experiments), sturdy rack and activity guide.|