Sarah desperately wants a horse for her birthday. She'll call it Treacle and they will go everywhere together. But as the presents for her birthday pile up, Sarah begins to act like a horse - galloping and stamping and whinnying.
Brenda wants to go on an interplanetary cultural exchange, organised by her school. This would mean that while Brenda spent a week on the curious-looking Planet of the Beezee Birds, her family would host a Beezeeian kid! While Brenda investigates the native diet of white jellies and nose biscuits and learns how to play mugboo, the alien Donk discovers chocolate and playing in treehuts!