National Space Centre - How good is it for 3 and 5 year olds??

[GeeWhizz]

We are planning on visiting the National Space Centre with 3 and 5 year old.

Has anyone else been with children this age?

Also any other recommendations to visit in Leicester as a family.

Hope you can help.

we took 2 nearly 7yo's and a 5yo last summer - the 5yo was only just old enough. We left the 2 3yo's at home and it was the right decision.

Thanks, think we'll wait a few years then.