Keeping Mentally Fit

CA and I were joking recently that soon we won't be able to competently supervise the girls in their schoolwork because Beth is learning so much everyday.

Example:

Beth's teacher gave her a crossword puzzle to do.
Clue: A platypus is a ---------
Beth scribbled next to the question: MONOTREME.

Me: What's a monotreme?

Beth: It's what a platypus is.

Me: What qualifies a platypus to be a monotreme? What does 'monotreme' mean?

Beth: A monotreme is a mammal that gives birth by laying eggs.

Apparently, this was something Beth learned when we visited Tassie last year. :-)
(Jen: remember our visit to Platypus World?)