Whilst looking at some TES Resources I came across an excellent interactive from MathsPad, a site with a growing collection of resources for teachers and students. The site is easy to navigate with a clear menu at the top of the various pages.
The various interactives are attractive and display very well on the interactive whiteboard. Many of these would make excellent starters or plenaries.
To access all the resources requires an annual subscription but there are free resources available in each section; I like this on matching surds for example
This is a site well worth exploring.