Something that went well was that the kids were intrigued by the slingshot.

Some thatg  that did not go well was that the complexity I think we would like it to be at was not there.

A thing that was unexpected wasmanyw may kids wanted play.

I would make it more complex and add different dynamics.

My advice would take bits of all the projects done before you apply them make them better..    https://blogs.isb.cn/29eveq/2023/01/18/design-cardboard…reflection–eve/