I came across this photo from 2002 tonight and it brought back happy memories of Bertie when he was young, healthy, and always getting into things. I think I got the kit from the Science Museum, but I can't recall what was in the box or what we learned. (It was a sad year for our family, best remembered as a blur.) We have proof that Bertie enjoyed the box, anyhow.
You can still get a "Fun with Your Cat" science kit here. I think I might have to try it again with the current crew.