Learning Resources 5×5 Pin Geoboard (Set of 10). Primary learners can get hands-on with geometry with these colourful 5×5 pin geoboards. Sturdy umbrella-head pins keep elastic bands in place as children explore geometric shapes, designs and symmetry. Set includes 10 plastic boards (two each of red, yellow, blue, purple and orange) and Elastic bands. Square boards measure 18cm. Suitable for ages 5+.