I know I have posted about our love for Tinkertoys  before, but we just love these so much that I must mention them again!! For over an hour...

A few popcicle sticks and some masking tape can be so entertaining.  First, we just rolled the marbles down the track. Now we are trying to ...

While this one was napping yesterday Martin started asking me how everything works.  It started off like this: "why gas burns under our...