Learning Resources Barnyard Friends Build & Spin. The Build & Spin Barnyard Friends set is an ideal introduction to the gears and cogs products. Fun gears designed for small hands and colourful farmyard friends combine to build children’s fine motor skills through play. Early learners can mix and match the plastic gears to develop an understanding of cause and effect. Includes plastic base board, eight large gears, seven friendly farm animal themed pieces and a chunky handle. Board measures 28cm L x 23cm W. Suitable for ages 2+.