Secret Agent Chicken is outside the farmyard. She is on an important mission to get into the hen house, but her attempts at climbing, tunnelling, flying or karate-chopping her way in have failed! Go and Stop are determined to help her. They discover that they need a special password to get through the farmyard gate. 

Go and Stop meet a very frustrated Arty. Toad wants him to create some really splatty art on his garden's stepping stones, but Arty can't get the pattern right. Which stones should he splat and which ones should he leave blank? Go and Stop look closely at Toad's pattern plan and realise that Do Blocks Hop and Splat can help.