Time tables practice for my youngest. I've been using playing cards (normal deck), which are fantastic and this is based of the same idea; where I still work with him and see if he beats the machine—no scoring, just fun practice.
You can filter the sets at the top, by deselecting any to be excluded. And change speed via buttons in footer.
Modified http://d3js.org/d3.v3.min.js to a secure url
https://d3js.org/d3.v3.min.js
https://cdnjs.cloudflare.com/ajax/libs/lodash.js/3.10.1/lodash.min.js