I would use the Rocket building activity with the junior end of the school for building Rocket Mice. I would motivate the children by showing pictures, videos or stories. I would create a sense of wonder by asking a starter question, I wonder how a rocket takes off. The pupils could predict, brainstorm, and then discuss forces that can cause movement e.g the wind, blowing paper etc. Then the children would construct their simple rocket mouse from paper and recycled bottles. We would conduct an investigation on which bottle pushes the mouse the furthest, how long it takes to drop to the floor etc. Then there could be a reflection on what conditions would change the flight of the mouse e.g. smaller bottle, heavier paper/card etc.
There is a lot of opportunity for cross-curricular links in this lesson, Art (construction), English (language, procedural discussion), Maths (measuring, counting, comparing), PE (darts/archery,) Drama (being something that can fly)