Varieties of Time Travel

My kids have been reading lots of books over the break, including an adventure series that involves time travel. Knowing vaguely that dad is a theoretical physicist, they asked me how time travel works. 1. Can one change history by influencing past events? OR 2. Is there only one timeline that cannot be altered, even …

More

Coding for kids

I’ve been trying to get my kids interested in coding. I found this nice game called Lightbot, in which one writes simple programs that control the discrete movements of a bot. It’s very intuitive and in just one morning my kids learned quite a bit about the idea of an algorithm and the notion of …

More