I’ve just discovered Crumble and so far am really impressed, really simple, effective and with the range of 4tronix crumbs an elegant solution to the problem of controlling real world devices in the Primary classroom. Being able to program it through Scratch would be the perfect soution. I love the work you’re doing, way beyond my level of competency so kudos is due. Is there a reason you’re going down the Scratch 1.4 route rather than adding Crumble as an extension in Scratch 2.0, as Lego Wedo or Picoboard does? The way that automatically adds bespoke commands in the ‘more commands’ window makes it more readily accessible to KS2 kids, and would be great with Crumble. Cheers.