I think that a rocket building lesson would be a great success with children of all ages and a lot of different ones were provided here!
With senior infants I would use the Rocket Mice experiment as it seems like it would be very achievable, as well as providing the appropriate level of challenge, for the younger age groups.
We would begin by watching a video of a real rocket launch and discussing what we notice about it. We would then begin to make our own rockets. the first step would be to cut out the template provided to make our cone shape. This would be a great fine motor activity for them to try independently. We will then tape them into the correct shape. Once this is done I’d ask the children to think of ways they could make the rocket fly? (After the first few suggestions expend this by stipulating without throwing it or holding it!) Hopefully this would lead to blowing on them and eventually we will use the bottles that the children have brought in. They will work in pairs to launch their rockets discussing how high they can travel, what happens with different bottles or different type of squeeze etc. We would finally discuss as a whole class what worked best and why we thought this was.
For science week there would plenty of ways to extend this using Aistear. The stations could include a role play area to be an astronaut launching a rocket, a small world station with rockets and maybe aliens on a different planet, and an art activity. I saw another person show an example of the children turning themselves into astronauts using a photo and a paper plate which is a brilliant idea that I will definitely be borrowing!