Package contents - 5 pieces of 50 ml jumbo test tubes - 6 pieces of 5 ml silicone liquid droppers - 1 stand Total: 12 pieces, meeting your testing needs for group or solo use Size and visibility - Drops: each dropper body has a clear scale from 1 ml to 5 ml for easy liquid control - Tubes: each 50 ml jumbo test tube features a clear volume scale for quick readings - Stand: approximately 7.8 inch x 3.7 inch x 1.9 inch (20 cm x 9.5 cm x 5 cm) Material and durability - Droppers: silicone for safety and flexibility - Tubes and stand: durable plastic - All parts are safe for use by kids and designed for easy handling Educational value - A practical discovery kit that enables safe, hands-on science exploration - Helps kids and beginners learn basic scientific concepts through observation and measurement _use scenarios_ - At home: perform simple liquid measurements and color-m mixing experiments - In the classroom: support small-group science activities and demonstrations - For beginners: introduce measurement, observation, and hypothesis testing as part of early science projects