Learning Resources Connecting Ten-Frame Trays. Children can show their workings with these connectable boards that have been specifically designed to reinforce early maths skills through hands-on practice. Great for developing skills such as counting, number patterns and early arithmetic. Young learners position the counters to work out and show their answers. Set includes 10 ten-frame trays, five five-frame trays and 150 coloured disks. Plastic trays are connectable via their length to make larger frames. Individual ten-frame trays measure 16cm L x 6.5cm W. Features multilingual activity guide. Suitable for ages 5+.