Learning Resources Three Bear Family Beginner’s Balance Set. The Three Bear Family also popularly known as the Compare Bears makes abstract maths concepts come to life for young children. Use this simple see-saw balance set to introduce mass and measurement learning in the classroom or at home. The balance arm snaps into place for quick set-up, and the sliding compensator clips make this balance easy to calibrate. The set includes1 balance, 10 weight related Three Bear Family counters and multilingual Activity Guide.