Learning Resources Primary Bucket Balance Teaching Scale. Explore volume and compare solids and liquids. Build observation and estimation skills while gaining a deeper understanding of mass measurement. Calibrated clear buckets with removable lids hold solids or up to 400 ml of liquid and allow students to see what’s inside. Set includes bucket balance with storage drawer, 2 removable easy-pour buckets, and 2 lids. Ages 3+ Used only a few times. Excellent condition! New to Poshmark? Use code LARISHBOOM for a $10 credit on your first order. Happy Poshing! Note: The color may appear slightly lighter or darker in person depending on your screen settings.