2017 Coloured Frosted Uncirculated Two Coin Set-Bananas in Pyjamas, 25th Anniversary. Bananas in Pyjamas has been watched and loved in Australia and around the world for the last 25 years. Its countless young fans have spent a quarter of a century chuckling at the antics of B1 and B2, and learning important lessons about co-operation, friendship, creativity and enjoyment. This 25th Anniversary of Bananas in Pyjamas 2 coin set features the first ever coloured 5c coin along with a coloured 20c coin, added together to mark 25 years. 20c Diameter 28.52mm, weight 11.30 grams, Metal CuNi, 5c Diameter 19.41 mm, weight 2.83 grams, Metal CuNi. Mintage 30,000.